1
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Rebilly JN, Herrero C, Sénéchal-David K, Guillot R, Banse F. Catalytic oxidation properties of an acid-resistant cross-bridged cyclen Fe(II) complex. Influence of the rigid donor backbone and protonation on the reactivity. Dalton Trans 2023. [PMID: 37334566 DOI: 10.1039/d3dt00393k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
The catalytic properties of an iron complex bearing a pentadentate cross-bridged ligand backbone are reported. With H2O2 as an oxidant, it displays moderate conversions in epoxidation and alkane hydroxylation and satisfactory ones in aromatic hydroxylation. Upon addition of an acid to the reaction medium, a significant enhancement in aromatic and alkene oxidation is observed. Spectroscopic analyses showed that accumulation of the expected FeIII(OOH) intermediate is limited under these conditions, unless an acid is added to the mixture. This is ascribed to the inertness induced by the cross-bridged ligand backbone, which is partly reduced under acidic conditions.
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Affiliation(s)
- Jean-Noël Rebilly
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), 91405 Orsay cedex, France.
| | - Christian Herrero
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), 91405 Orsay cedex, France.
| | - Katell Sénéchal-David
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), 91405 Orsay cedex, France.
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), 91405 Orsay cedex, France.
| | - Frédéric Banse
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), 91405 Orsay cedex, France.
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2
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Sun C, Jaimes JL, Follmer AH, Ziller JW, Borovik AS. Selective C-H Bond Cleavage with a High-Spin Fe IV-Oxido Complex. Molecules 2023; 28:4755. [PMID: 37375309 DOI: 10.3390/molecules28124755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/23/2023] [Accepted: 06/03/2023] [Indexed: 06/29/2023] Open
Abstract
Non-heme Fe monooxygenases activate C-H bonds using intermediates with high-spin FeIV-oxido centers. To mimic these sites, a new tripodal ligand [pop]3- was prepared that contains three phosphoryl amido groups that are capable of stabilizing metal centers in high oxidation states. The ligand was used to generate [FeIVpop(O)]-, a new FeIV-oxido complex with an S = 2 spin ground state. Spectroscopic measurements, which included low-temperature absorption and electron paramagnetic resonance spectroscopy, supported the assignment of a high-spin FeIV center. The complex showed reactivity with benzyl alcohol as the external substrate but not with related compounds (e.g., ethyl benzene and benzyl methyl ether), suggesting the possibility that hydrogen bonding interaction(s) between the substrate and [FeIVpop(O)]- was necessary for reactivity. These results exemplify the potential role of the secondary coordination sphere in metal-mediated processes.
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Affiliation(s)
- Chen Sun
- Department of Chemistry, University of California-Irvine, Irvine, CA 92697, USA
| | - Jennifer L Jaimes
- Department of Chemistry, University of California-Irvine, Irvine, CA 92697, USA
| | - Alec H Follmer
- Department of Chemistry, University of California-Irvine, Irvine, CA 92697, USA
| | - Joseph W Ziller
- Department of Chemistry, University of California-Irvine, Irvine, CA 92697, USA
| | - Andrew S Borovik
- Department of Chemistry, University of California-Irvine, Irvine, CA 92697, USA
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3
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Kejriwal A. Non-heme iron coordination complexes for alkane oxidation using hydrogen peroxide (H 2O 2) as powerful oxidant. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2085567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ambica Kejriwal
- Department of Chemistry, Raiganj University, Raiganj, West Bengal, India
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4
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Dedushko MA, Greiner MB, Downing AN, Coggins M, Kovacs JA. Electronic Structure and Reactivity of Dioxygen-Derived Aliphatic Thiolate-Ligated Fe-Peroxo and Fe(IV) Oxo Compounds. J Am Chem Soc 2022; 144:8515-8528. [PMID: 35522532 DOI: 10.1021/jacs.1c07656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Herein, we examine the electronic and geometric structural properties of O2-derived aliphatic thiolate-ligated Fe-peroxo, Fe-hydroxo, and Fe(IV) oxo compounds. The latter cleaves strong C-H bonds (96 kcal mol-1) on par with the valine C-H bond cleaved by isopencillin N synthase (IPNS). Stopped-flow kinetics studies indicate that the barrier to O2 binding to [FeII(SMe2N4(tren))]+ (3) is extremely low (Ea = 36(2) kJ mol-1), as theoretically predicted for IPNS. Dioxygen binding to 3 is shown to be reversible, and a superoxo intermediate, [FeIII(SMe2N4(tren))(O2)]+ (6), forms in the first 25 ms of the reaction at -40 °C prior to the rate-determining (Ea = 46(2) kJ mol-1) formation of peroxo-bridged [(SMe2N4(tren))Fe(III)]2(μ-O2)2+ (7). A log(kobs) vs log([Fe]) plot for the formation of 7 is consistent with the second-order dependence on iron, and H2O2 assays are consistent with a 2:1 ratio of Fe/H2O2. Peroxo 7 is shown to convert to ferric-hydroxo [FeIII(SMe2N(tren))(OH)]+ (9, g⊥ = 2.24, g∥ = 1.96), the identity of which was determined via its independent synthesis. Rates of the conversion 7 → 9 are shown to be dependent on the X-H bond strength of the H-atom donor, with a kH/kD = 4 when CD3OD is used in place of CH3OH as a solvent. A crystallographically characterized cis thiolate-ligated high-valent iron oxo, [FeIV(O)(SMe2N4(tren))]+ (11), is shown to form en route to hydroxo 9. Electronic structure calculations were shown to be consistent with 11 being an S = 1 Fe(IV)═O with an unusually high νFe-O stretching frequency at 918 cm-1 in line with the extremely short Fe-O bond (1.603(7) Å).
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Affiliation(s)
- Maksym A Dedushko
- Department of Chemistry, University of Washington, Campus Box 351700, Seattle, Washington 98195-1700, United States
| | - Maria B Greiner
- Department of Chemistry, University of Washington, Campus Box 351700, Seattle, Washington 98195-1700, United States
| | - Alexandra N Downing
- Department of Chemistry, University of Washington, Campus Box 351700, Seattle, Washington 98195-1700, United States
| | - Michael Coggins
- Department of Chemistry, University of Washington, Campus Box 351700, Seattle, Washington 98195-1700, United States
| | - Julie A Kovacs
- Department of Chemistry, University of Washington, Campus Box 351700, Seattle, Washington 98195-1700, United States
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5
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Bleher K, Comba P, Gross JH, Josephy T. ESI and tandem MS for mechanistic studies with high-valent transition metal species. Dalton Trans 2022; 51:8625-8639. [DOI: 10.1039/d2dt00809b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The analysis of high-valent metal species has been in the focus of research for over 20 years. Mass spectrometry (MS) represents a technique routinely used for their characterization, in particular...
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6
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Nesterova OV, Kuznetsov ML, Pombeiro AJL, Shul'pin GB, Nesterov DS. Homogeneous oxidation of C–H bonds with m-CPBA catalysed by a Co/Fe system: mechanistic insights from the point of view of the oxidant. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01991k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Co/Fe system efficiently catalyses the oxidation of C–H bonds with m-CPBA. The nitric acid promoter hampers the m-CPBA homolysis, suppressing the free radical activity. Experimental and computational data evidence a concerted oxidation mechanism.
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Affiliation(s)
- Oksana V. Nesterova
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Maxim L. Kuznetsov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Peoples' Friendship University of Russia (RUDN University), Research Institute of Chemistry, 6 Miklukho-Maklaya st, Moscow 117198, Russia
| | - Georgiy B. Shul'pin
- Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Ulitsa Kosygina 4, Moscow 119991, Russia
- Chair of Chemistry and Physics, Plekhanov Russian University of Economics, Stremyannyi pereulok 36, Moscow 117997, Russia
| | - Dmytro S. Nesterov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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7
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Rebilly JN, Herrero C, Sénéchal-David K, Guillot R, Inceoglu T, Maisonneuve H, Banse F. Second-sphere effects on H 2O 2 activation by non-heme Fe II complexes: role of a phenol group in the [H 2O 2]-dependent accumulation of Fe IVO vs. Fe IIIOOH. Chem Sci 2021; 12:15691-15699. [PMID: 35003600 PMCID: PMC8653992 DOI: 10.1039/d1sc03303d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 11/17/2021] [Indexed: 12/03/2022] Open
Abstract
Redox metalloenzymes achieve very selective oxidation reactions under mild conditions using O2 or H2O2 as oxidants and release harmless side-products like water. Their oxidation selectivity is intrinsically linked to the control of the oxidizing species generated during the catalytic cycle. To do so, a second coordination sphere is used in order to create a pull effect during the activation of O2 or H2O2, thus ensuring a heterolytic O-O bond cleavage. Herein, we report the synthesis and study of a new non-heme FeII complex bearing a pentaazadentate first coordination sphere and a pendant phenol group. Its reaction with H2O2 generates the classical FeIIIOOH species at high H2O2 loading. But at low H2O2 concentrations, an FeIVO species is generated instead. The formation of the latter is directly related to the presence of the 2nd sphere phenol group. Kinetic, variable temperature and labelling studies support the involvement of the attached phenol as a second coordination sphere moiety (weak acid) during H2O2 activation. Our results suggest a direct FeII → FeIVO conversion directed by the 2nd sphere phenol via the protonation of the distal O atom of the FeII/H2O2 adduct leading to a heterolytic O-O bond cleavage.
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Affiliation(s)
- Jean-Noël Rebilly
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) 91405 Orsay Cedex France
| | - Christian Herrero
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) 91405 Orsay Cedex France
| | - Katell Sénéchal-David
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) 91405 Orsay Cedex France
| | - Régis Guillot
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) 91405 Orsay Cedex France
| | - Tanya Inceoglu
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) 91405 Orsay Cedex France
| | - Hélène Maisonneuve
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) 91405 Orsay Cedex France
| | - Frédéric Banse
- Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) 91405 Orsay Cedex France
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8
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Munshi S, Jana RD, Paine TK. Oxidative degradation of toxic organic pollutants by water soluble nonheme iron(iv)-oxo complexes of polydentate nitrogen donor ligands. Dalton Trans 2021; 50:5590-5597. [PMID: 33908934 DOI: 10.1039/d0dt04421k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The ability of four mononuclear nonheme iron(iv)-oxo complexes supported by polydentate nitrogen donor ligands to degrade organic pollutants has been investigated. The water soluble iron(ii) complexes upon treatment with ceric ammonium nitrate (CAN) in aqueous solution are converted into the corresponding iron(iv)-oxo complexes. The hydrogen atom transfer (HAT) ability of iron(iv)-oxo species has been exploited for the oxidation of halogenated phenols and other toxic pollutants with weak X-H (X = C, O, S, etc.) bonds. The iron-oxo oxidants can oxidize chloro- and fluorophenols with moderate to high yields under stoichiometric as well as catalytic conditions. Furthermore, these oxidants perform selective oxidative degradation of several persistent organic pollutants (POPs) such as bisphenol A, nonylphenol, 2,4-D (2,4-dichlorophenoxyacetic acid) and gammaxene. This work demonstrates the utility of water soluble iron(iv)-oxo complexes as potential catalysts for the oxidative degradation of a wide range of toxic pollutants, and these oxidants could be considered as an alternative to conventional oxidation methods.
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Affiliation(s)
- Sandip Munshi
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A&2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
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9
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Wegeberg C, Skavenborg ML, Liberato A, McPherson JN, Browne WR, Hedegård ED, McKenzie CJ. Engineering the Oxidative Potency of Non-Heme Iron(IV) Oxo Complexes in Water for C-H Oxidation by a cis Donor and Variation of the Second Coordination Sphere. Inorg Chem 2021; 60:1975-1984. [PMID: 33470794 DOI: 10.1021/acs.inorgchem.0c03441] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A series of iron(IV) oxo complexes, which differ in the donor (CH2py or CH2COO-) cis to the oxo group, three with hemilabile pendant donor/second coordination sphere base/acid arms (pyH/py or ROH), have been prepared in water at pH 2 and 7. The νFe═O values of 832 ± 2 cm-1 indicate similar FeIV═O bond strengths; however, different reactivities toward C-H substrates in water are observed. HAT occurs at rates that differ by 1 order of magnitude with nonclassical KIEs (kH/kD = 30-66) consistent with hydrogen atom tunneling. Higher KIEs correlate with faster reaction rates as well as a greater thermodynamic stability of the iron(III) resting states. A doubling in rate from pH 7 to pH 2 for substrate C-H oxidation by the most potent complex, that with a cis-carboxylate donor, [FeIVO(Htpena)]2+, is observed. Supramolecular assistance by the first and second coordination spheres in activating the substrate is proposed. The lifetime of this complex in the absence of a C-H substrate is the shortest (at pH 2, 3 h vs up to 1.3 days for the most stable complex), implying that slow water oxidation is a competing background reaction. The iron(IV)═O complex bearing an alcohol moiety in the second coordination sphere displays significantly shorter lifetimes due to a competing selective intramolecular oxidation of the ligand.
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Affiliation(s)
- Christina Wegeberg
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.,Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Mathias L Skavenborg
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.,Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales, Australia
| | - Andrea Liberato
- Universidad de Cádiz, Facultad de Ciencias, Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Puerto Real, Cádiz 11510, Spain
| | - James N McPherson
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Wesley R Browne
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Erik D Hedegård
- Division of Theoretical Chemistry, Lund University, Naturvetarvägen 14, 221 00 Lund, Sweden
| | - Christine J McKenzie
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
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10
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Yeh CG, Hörner G, Visser SP. Computational Study on O–O Bond Formation on a Mononuclear Non‐Heme Iron Center. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chieh‐Chih George Yeh
- Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science The University of Manchester 131 Princess Street M1 7DN Manchester UK
| | - Gerald Hörner
- Institut für Anorganische Chemie IV / NW I Universität Bayreuth Universitätsstraße 30 95440 Bayreuth Germany
| | - Sam P. Visser
- Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science The University of Manchester 131 Princess Street M1 7DN Manchester UK
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11
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Liang S, Zhu L, Hua J, Duan W, Yang PT, Wang SL, Wei C, Liu C, Feng C. Fe 2+/HClO Reaction Produces Fe IVO 2+: An Enhanced Advanced Oxidation Process. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:6406-6414. [PMID: 32157878 DOI: 10.1021/acs.est.0c00218] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The reaction between Fe2+ and HClO constitutes a promising advanced oxidation process (AOP) for removing pollutants from wastewater, and •OH has been considered the dominant reactive oxidant despite limited evidence for this. Herein, we demonstrate that the Fe2+/HClO reaction enables the production of FeIVO2+ rather than •OH in acid medium, a finding that is strongly supported by multiple lines of evidence. Both X-ray absorption near-edge structure spectroscopic tests and Mössbauer spectroscopic tests confirmed the appearance of FeIVO2+ as the reactive intermediate in the reaction between Fe2+ and HClO. The determination of FeIVO2+ generation was also derived from the methyl phenyl sulfoxide (PMSO)-based probe experiments with respect to the formation of PMSO2 without •OH adducts and the density functional theory studies according to the lower energy barrier for producing FeIVO2+ compared with •OH. A dual-anode electrolytic system was established for the in situ generation of Fe2+ and HClO that allows the production of FeIVO2+. The system exhibits an enhanced capacity for oxidizing a model pollutant (e.g., phosphite) from industrial wastewater, making it an attractive and promising AOP for the abatement of aqueous contaminants.
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Affiliation(s)
- Sheng Liang
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Liuyi Zhu
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Jian Hua
- Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510640, PR China
| | - Weijian Duan
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Puu-Tai Yang
- Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan, ROC
| | - Shan-Li Wang
- Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan, ROC
| | - Chaohai Wei
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Chengshuai Liu
- Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510640, PR China
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China
| | - Chunhua Feng
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
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12
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Mukherjee G, Reinhard FGC, Bagha UK, Sastri CV, de Visser SP. Sluggish reactivity by a nonheme iron(iv)-tosylimido complex as compared to its oxo analogue. Dalton Trans 2020; 49:5921-5931. [DOI: 10.1039/d0dt00018c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A comparative spectroscopic and computational study of reactivity between ferryl-tosylimido and ferryl-oxo complexes of two biomimetic model systems. The Fe(iv)-tosylimido complex was found to be sluggish in comparison to its fellow oxo counterpart.
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Affiliation(s)
- Gourab Mukherjee
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Fabián G. Cantú Reinhard
- The Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science
- The University of Manchester
- Manchester M1 7DN
- UK
| | | | | | - Sam P. de Visser
- The Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science
- The University of Manchester
- Manchester M1 7DN
- UK
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13
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Rebilly J, Zhang W, Herrero C, Dridi H, Sénéchal‐David K, Guillot R, Banse F. Hydroxylation of Aromatics by H
2
O
2
Catalyzed by Mononuclear Non‐heme Iron Complexes: Role of Triazole Hemilability in Substrate‐Induced Bifurcation of the H
2
O
2
Activation Mechanism. Chemistry 2019; 26:659-668. [DOI: 10.1002/chem.201903239] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Jean‐Noël Rebilly
- Institut de Chimie Moléculaire et des Matériaux d'OrsayUniversité Paris-Sud, Université Paris-Saclay 91405 Orsay cedex France
| | - Wenli Zhang
- Institut de Chimie Moléculaire et des Matériaux d'OrsayUniversité Paris-Sud, Université Paris-Saclay 91405 Orsay cedex France
| | - Christian Herrero
- Institut de Chimie Moléculaire et des Matériaux d'OrsayUniversité Paris-Sud, Université Paris-Saclay 91405 Orsay cedex France
| | - Hachem Dridi
- Institut de Chimie Moléculaire et des Matériaux d'OrsayUniversité Paris-Sud, Université Paris-Saclay 91405 Orsay cedex France
| | - Katell Sénéchal‐David
- Institut de Chimie Moléculaire et des Matériaux d'OrsayUniversité Paris-Sud, Université Paris-Saclay 91405 Orsay cedex France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'OrsayUniversité Paris-Sud, Université Paris-Saclay 91405 Orsay cedex France
| | - Frédéric Banse
- Institut de Chimie Moléculaire et des Matériaux d'OrsayUniversité Paris-Sud, Université Paris-Saclay 91405 Orsay cedex France
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14
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Mubarak MQE, de Visser SP. Reactivity patterns of vanadium(iv/v)-oxo complexes with olefins in the presence of peroxides: a computational study. Dalton Trans 2019; 48:16899-16910. [PMID: 31670737 DOI: 10.1039/c9dt03048d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Vanadium porphyrin complexes are naturally occurring substances found in crude oil and have been shown to have medicinal properties as well. Little is known on their activities with substrates; therefore, we decided to perform a detailed density functional theory study on the properties and reactivities of vanadium(iv)- and vanadium(v)-oxo complexes with a TPPCl8 or 2,3,7,8,12,13,17,18-octachloro-meso-tetraphenylporphyrinato ligand system. In particular, we investigated the reactivity of [VV(O)(TPPCl8)]+ and [VIV(O)(TPPCl8)] with cyclohexene in the presence of H2O2 or HCO4-. The work shows that vanadium(iv)-oxo and vanadium(v)-oxo are sluggish oxidants by themselves and react with olefins slowly. However, in the presence of hydrogen peroxide, these metal-oxo species can be transformed into a side-on vanadium-peroxo complex, which reacts with substrates more efficiently. Particularly with anionic axial ligands, the side-on vanadium-peroxo and vanadium-oxo complexes produced epoxides from cyclohexene via small barrier heights. In addition to olefin epoxidation, we investigated aliphatic hydroxylation mechanisms by the same oxidants and some oxidants show efficient and viable cyclohexene hydroxylation mechanisms. The work implies that vanadium-oxo and vanadium-peroxo complexes can react with double bonds through epoxidation, and under certain conditions also undergo hydroxylation, but the overall reactivity is highly dependent on the equatorial ligand, the local environment and the presence or absence of anionic axial ligands.
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Affiliation(s)
- M Qadri E Mubarak
- The Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, UK.
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15
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Mubarak MQE, de Visser SP. Second-Coordination Sphere Effect on the Reactivity of Vanadium–Peroxo Complexes: A Computational Study. Inorg Chem 2019; 58:15741-15750. [DOI: 10.1021/acs.inorgchem.9b01778] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Qadri E. Mubarak
- Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Sam P. de Visser
- Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
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16
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Kroll N, Speckmann I, Schoknecht M, Gülzow J, Diekmann M, Pfrommer J, Stritt A, Schlangen M, Grohmann A, Hörner G. O−O Bond Formation and Liberation of Dioxygen Mediated by N 5‐Coordinate Non‐Heme Iron(IV) Complexes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nicole Kroll
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Ina Speckmann
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Marc Schoknecht
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Jana Gülzow
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Marek Diekmann
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Johannes Pfrommer
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Anika Stritt
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Maria Schlangen
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Andreas Grohmann
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Gerald Hörner
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
- Permanent address: Institut für Anorganische Chemie IVUniversität Bayreuth Universitätsstraße 30, NW I 95540 Bayreuth Germany
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17
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Kroll N, Speckmann I, Schoknecht M, Gülzow J, Diekmann M, Pfrommer J, Stritt A, Schlangen M, Grohmann A, Hörner G. O-O Bond Formation and Liberation of Dioxygen Mediated by N 5 -Coordinate Non-Heme Iron(IV) Complexes. Angew Chem Int Ed Engl 2019; 58:13472-13478. [PMID: 31271694 PMCID: PMC6772150 DOI: 10.1002/anie.201903902] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 06/07/2019] [Indexed: 01/04/2023]
Abstract
Formation of the O-O bond is considered the critical step in oxidative water cleavage to produce dioxygen. High-valent metal complexes with terminal oxo (oxido) ligands are commonly regarded as instrumental for oxygen evolution, but direct experimental evidence is lacking. Herein, we describe the formation of the O-O bond in solution, from non-heme, N5 -coordinate oxoiron(IV) species. Oxygen evolution from oxoiron(IV) is instantaneous once meta-chloroperbenzoic acid is administered in excess. Oxygen-isotope labeling reveals two sources of dioxygen, pointing to mechanistic branching between HAT (hydrogen atom transfer)-initiated free-radical pathways of the peroxides, which are typical of catalase-like reactivity, and iron-borne O-O coupling, which is unprecedented for non-heme/peroxide systems. Interpretation in terms of [FeIV (O)] and [FeV (O)] being the resting and active principles of the O-O coupling, respectively, concurs with fundamental mechanistic ideas of (electro-) chemical O-O coupling in water oxidation catalysis (WOC), indicating that central mechanistic motifs of WOC can be mimicked in a catalase/peroxidase setting.
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Affiliation(s)
- Nicole Kroll
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Ina Speckmann
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Marc Schoknecht
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Jana Gülzow
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Marek Diekmann
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Johannes Pfrommer
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Anika Stritt
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Maria Schlangen
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Andreas Grohmann
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Gerald Hörner
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
- Permanent address: Institut für Anorganische Chemie IVUniversität BayreuthUniversitätsstraße 30, NW I95540BayreuthGermany
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18
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Sénéchal-David K, Buron C, Ségaud N, Rebilly JN, Dos Santos A, Farjon J, Guillot R, Herrero C, Inceoglu T, Banse F. Non-Heme Fe II Diastereomeric Complexes Bearing a Hexadentate Ligand: Unexpected Consequences for the Spin State and Catalytic Oxidation Properties. Chemistry 2019; 25:12405-12411. [PMID: 31276256 DOI: 10.1002/chem.201902423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/03/2019] [Indexed: 12/12/2022]
Abstract
The reactivity and selectivity of non-heme FeII complexes as oxidation catalysts can be substantially modified by alteration of the ligand backbone or introduction of various substituents. In comparison with the hexadentate ligand N,N,N',N'-tetrakis(pyridin-2-ylmethyl)ethane-1,2-diamine (TPEN), N,N'-bis[1-(pyridin-2-yl)ethyl]-N,N'-bis(pyridin-2-ylmethyl)ethane-1,2-diamine (2Me L6 2 ) has a methyl group on two of the four picolyl positions. FeII complexation by 2Me L6 2 yields two diastereomeric complexes with very similar structures, which only differ in the axial/equatorial positions occupied by the methylated pyridyl groups. In solution, these two isomers exhibit different magnetic behaviors. Whereas one isomer exhibits temperature-dependent spin-state conversion between the S=0 and S=2 states, the other is more reluctant towards this spin-state equilibrium and is essentially diamagnetic at room temperature. Their catalytic properties for the oxidation of anisole by H2 O2 are very different and correlate with their magnetic properties, which reflect their lability/inertness. These different properties most likely depend on the different steric constraints of the methylated pyridyl groups in the two complexes.
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Affiliation(s)
- Katell Sénéchal-David
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
| | - Charlotte Buron
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
| | - Nathalie Ségaud
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France.,Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Jean-Noël Rebilly
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
| | - Amandine Dos Santos
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
| | - Jonathan Farjon
- CEISAM, Université de Nantes, CNRS, 2, chemin de la Houssinière, 44322, Nantes CEDEX 3, France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
| | - Christian Herrero
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
| | - Tanya Inceoglu
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
| | - Frédéric Banse
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Univ. Paris-Sud, Univ. Paris-Saclay, CNRS, 91405, Orsay cedex, France
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19
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Mukherjee G, Alili A, Barman P, Kumar D, Sastri CV, de Visser SP. Interplay Between Steric and Electronic Effects: A Joint Spectroscopy and Computational Study of Nonheme Iron(IV)-Oxo Complexes. Chemistry 2019; 25:5086-5098. [PMID: 30720909 DOI: 10.1002/chem.201806430] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Indexed: 01/05/2023]
Abstract
Iron is an essential element in nonheme enzymes that plays a crucial role in many vital oxidative transformations and metabolic reactions in the human body. Many of those reactions are regio- and stereospecific and it is believed that the selectivity is guided by second-coordination sphere effects in the protein. Here, results are shown of a few engineered biomimetic ligand frameworks based on the N4Py (N,N-bis(2-pyridylmethyl)-N-bis(2-pyridyl)methylamine) scaffold and the second-coordination sphere effects are studied. For the first time, selective substitutions in the ligand framework have been shown to tune the catalytic properties of the iron(IV)-oxo complexes by regulating the steric and electronic factors. In particular, a better positioning of the oxidant and substrate in the rate-determining transition state lowers the reaction barriers. Therefore, an optimum balance between steric and electronic factors mediates the ideal positioning of oxidant and substrate in the rate-determining transition state that affects the reactivity of high-valent reaction intermediates.
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Affiliation(s)
- Gourab Mukherjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Aligulu Alili
- The Manchester Institute of Biotechnology and School of Chemical, Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Prasenjit Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Devesh Kumar
- Department of Applied Physics, Babasaheb Bhimrao Ambedkar University, School for Physical Sciences, Vidya Vihar, Rae Bareilly Road, Lucknow, 226025, UP, India
| | - Chivukula V Sastri
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Sam P de Visser
- The Manchester Institute of Biotechnology and School of Chemical, Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
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20
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Singh O, Gupta P, Singh A, Maji A, Singh UP, Ghosh K. Selective oxidation of benzyl alcohol to benzaldehyde, 1‐phenylethanol to acetophenone and fluorene to fluorenol catalysed by iron (II) complexes supported by pincer‐type ligands: Studies on rapid degradation of organic dyes. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4825] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ovender Singh
- Department of ChemistryIIT Roorkee Roorkee 247667 Uttarakhand India
| | - Priyanka Gupta
- Department of ChemistryIIT Roorkee Roorkee 247667 Uttarakhand India
| | - Anshu Singh
- Department of ChemistryIIT Roorkee Roorkee 247667 Uttarakhand India
| | - Ankur Maji
- Department of ChemistryIIT Roorkee Roorkee 247667 Uttarakhand India
| | - Udai P. Singh
- Department of ChemistryIIT Roorkee Roorkee 247667 Uttarakhand India
| | - Kaushik Ghosh
- Department of ChemistryIIT Roorkee Roorkee 247667 Uttarakhand India
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21
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Singh R, Ganguly G, Malinkin SO, Demeshko S, Meyer F, Nordlander E, Paine TK. A Mononuclear Nonheme Iron(IV)-Oxo Complex of a Substituted N4Py Ligand: Effect of Ligand Field on Oxygen Atom Transfer and C–H Bond Cleavage Reactivity. Inorg Chem 2019; 58:1862-1876. [DOI: 10.1021/acs.inorgchem.8b02577] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Reena Singh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Gaurab Ganguly
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Sergey O. Malinkin
- Chemical Physics, Department of Chemistry, Lund University, Box 124, SE-22100 Lund, Sweden
| | - Serhiy Demeshko
- Universität
Göttingen, Institut für Anorganische Chemie, Tammanstrasse 4, D-37077 Göttingen, Germany
| | - Franc Meyer
- Universität
Göttingen, Institut für Anorganische Chemie, Tammanstrasse 4, D-37077 Göttingen, Germany
| | - Ebbe Nordlander
- Chemical Physics, Department of Chemistry, Lund University, Box 124, SE-22100 Lund, Sweden
| | - Tapan Kanti Paine
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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22
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Bohn A, Chinaux-Chaix C, Cheaib K, Guillot R, Herrero C, Sénéchal-David K, Rebilly JN, Banse F. Base-controlled mechanistic divergence between iron(iv)-oxo and iron(iii)-hydroperoxo in the H2O2 activation by a nonheme iron(ii) complex. Dalton Trans 2019; 48:17045-17051. [DOI: 10.1039/c9dt03487k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An FeII complex reacts with excess H2O2 in the presence of sub-stoichiometric NEt3 to give FeIV(O) and FeIII(OOH) reactive species following a base-dependent and a base-independent pathway, respectively.
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Affiliation(s)
- Antoine Bohn
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
| | - Clémence Chinaux-Chaix
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
| | - Khaled Cheaib
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
| | - Christian Herrero
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
| | - Katell Sénéchal-David
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
| | - Jean-Noël Rebilly
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
| | - Frédéric Banse
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ. Paris-Sud
- Univ. Paris-Saclay
- CNRS
- 91405 Orsay cedex
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23
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Wegeberg C, Lauritsen FR, Frandsen C, Mørup S, Browne WR, McKenzie CJ. Directing a Non-Heme Iron(III)-Hydroperoxide Species on a Trifurcated Reactivity Pathway. Chemistry 2017; 24:5134-5145. [DOI: 10.1002/chem.201704615] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Christina Wegeberg
- Department of Physics, Chemistry and Pharmacy; University of Southern Denmark; Campusvej 55 5230 Odense M Denmark
| | - Frants R. Lauritsen
- Department of Physics, Chemistry and Pharmacy; University of Southern Denmark; Campusvej 55 5230 Odense M Denmark
| | - Cathrine Frandsen
- Department of Physics; Technical University of Denmark; 2800 Kongens Lyngby Denmark
| | - Steen Mørup
- Department of Physics; Technical University of Denmark; 2800 Kongens Lyngby Denmark
| | - Wesley R. Browne
- Molecular Inorganic Chemistry; Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Christine J. McKenzie
- Department of Physics, Chemistry and Pharmacy; University of Southern Denmark; Campusvej 55 5230 Odense M Denmark
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24
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Speciation in iron epoxidation catalysis: A perspective on the discovery and role of non-heme iron(III)-hydroperoxo species in iron-catalyzed oxidation reactions. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.09.015] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Talsi EP, Samsonenko DG, Ottenbacher RV, Bryliakov KP. Highly Enantioselective C−H Oxidation of Arylalkanes with H2
O2
in the Presence of Chiral Mn-Aminopyridine Complexes. ChemCatChem 2017. [DOI: 10.1002/cctc.201701169] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Evgenii P. Talsi
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russian Federation
| | - Denis G. Samsonenko
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Nikolaev Institute of Inorganic Chemistry; Pr. Lavrentieva 3 Novosibirsk 630090 Russian Federation
| | - Roman V. Ottenbacher
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russian Federation
| | - Konstantin P. Bryliakov
- Novosibirsk State University; Pirogova 2 Novosibirsk 630090 Russian Federation
- Boreskov Institute of Catalysis; Pr. Lavrentieva 5 Novosibirsk 630090 Russian Federation
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26
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Cheaib K, Herrero C, Guillot R, Banse F, Mahy J, Avenier F. Imidazolidine Ring Cleavage upon Complexation with First‐Row Transition Metals. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700605] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Khaled Cheaib
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR CNRS 8182) Univ. Paris Sud Université Paris Saclay 91405 Orsay Cedex France
| | - Christian Herrero
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR CNRS 8182) Univ. Paris Sud Université Paris Saclay 91405 Orsay Cedex France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR CNRS 8182) Univ. Paris Sud Université Paris Saclay 91405 Orsay Cedex France
| | - Frédéric Banse
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR CNRS 8182) Univ. Paris Sud Université Paris Saclay 91405 Orsay Cedex France
| | - Jean‐Pierre Mahy
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR CNRS 8182) Univ. Paris Sud Université Paris Saclay 91405 Orsay Cedex France
| | - Frédéric Avenier
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR CNRS 8182) Univ. Paris Sud Université Paris Saclay 91405 Orsay Cedex France
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27
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Ghosh M, Pattanayak S, Dhar BB, Singh KK, Panda C, Sen Gupta S. Selective C-H Bond Oxidation Catalyzed by the Fe-bTAML Complex: Mechanistic Implications. Inorg Chem 2017; 56:10852-10860. [PMID: 28841016 DOI: 10.1021/acs.inorgchem.7b00453] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Nonheme iron complexes bearing tetradentate N-atom-donor ligands with cis labile sites show great promise for chemoselective aliphatic C-H hydroxylation. However, several challenges still limit their widespread application. We report a mechanism-guided development of a peroxidase mimicking iron complex based on the bTAML macrocyclic ligand framework (Fe-bTAML: biuret-modified tetraamido macrocyclic ligand) as a catalyst to perform selective oxidation of unactivated 3° bonds with unprecedented regioselectivity (3°:2° of 110:1 for adamantane oxidation), high stereoretention (99%), and turnover numbers (TONs) up to 300 using mCPBA as the oxidant. Ligand decomposition pathways involving acid-induced demetalation were identified, and this led to the development of more robust and efficient Fe-bTAML complexes that catalyzed chemoselective C-H oxidation. Mechanistic studies, which include correlation of the product formed with the FeV(O) reactive intermediates generated during the reaction, indicate that the major pathway involves the cleavage of C-H bonds by FeV(O). When these oxidations were performed in the presence of air, the yield of the oxidized product doubled, but the stereoretention remained unchanged. On the basis of 18O labeling and other mechanistic studies, we propose a mechanism that involves the dual activation of mCPBA and O2 by Fe-bTAML, leading to formation of the FeV(O) intermediate. This high-valent iron oxo remains the active intermediate for most of the reaction, resulting in high regio- and stereoselectivity during product formation.
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Affiliation(s)
- Munmun Ghosh
- Chemical Engineering Division, CSIR, National Chemical Laboratory , Pune 411008, India
| | - Santanu Pattanayak
- Chemical Engineering Division, CSIR, National Chemical Laboratory , Pune 411008, India
| | - Basab B Dhar
- Department of Chemistry, Shiv Nadar University , Gautam Buddha Nagar, Uttar Pradesh 201314, India
| | - Kundan K Singh
- Chemical Engineering Division, CSIR, National Chemical Laboratory , Pune 411008, India
| | - Chakadola Panda
- Chemical Engineering Division, CSIR, National Chemical Laboratory , Pune 411008, India
| | - Sayam Sen Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246, India
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28
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Tyagi N, Singh O, Ghosh K. Non-heme iron(III) complex with tridentate ligand: Synthesis, structures and catalytic oxidations of alkanes. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.02.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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29
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Ségaud N, De Thomasson C, Daverat C, Sénéchal-David K, Dos Santos A, Steinmetz V, Maître P, Rebilly JN, Banse F, Reinaud O. Mimicking the Regulation Step of Fe-Monooxygenases: Allosteric Modulation of Fe IV -Oxo Formation by Guest Binding in a Dinuclear Zn II -Fe II Calix[6]arene-Based Funnel Complex. Chemistry 2017; 23:2894-2906. [PMID: 28128474 DOI: 10.1002/chem.201605248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Indexed: 11/10/2022]
Abstract
A heteroditopic ligand associated with a calix[6]arene scaffold bearing a tris(imidazole) coordinating site at its small rim and an amine/pyridine ligand at its large rim has been prepared, and its regioselective coordination to ZnII at the small rim and FeII in the amine/pyridine ligand has been achieved. The heterodinuclear complex obtained displays an overall cone conformation capped by the tris(imidazole)ZnII moiety and bears a non-heme FeII complex at its base. Each of the metal centers exhibits one labile position, allowing the coordination inside the cavity of a guest alkylamine at ZnII and the generation of reaction intermediates (FeIII (OOH) and FeIV O) at the large rim. A dependence between the chain length of the encapsulated alkylamine and the distribution of FeIII (OOH) intermediates and FeIII (OMe) is observed. In addition, it is shown that the generation of the FeIV O intermediate is enhanced by addition of the alkylamine guest. Hence, this supramolecular system gathers the three levels of reactivity control encountered in oxidoreductases: i) control of the FeII redox properties through its first coordination sphere, allowing us to generate high valent reactive species; ii) control of guest binding through a hydrophobic funnel that drives its alkyl chain next to the reactive iron complex, thus mimicking the binding pocket of natural systems; iii) guest-modulated reactivity of the FeII center towards oxidants.
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Affiliation(s)
- Nathalie Ségaud
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Laboratoire de Chimie Inorganique, Université Paris Sud, Université Paris Saclay, CNRS, 91405, Orsay, France
| | - Constance De Thomasson
- CNRS UMR 8601, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, Sorbonne Paris Cité, 75006, Paris, France
| | - Caroline Daverat
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Laboratoire de Chimie Inorganique, Université Paris Sud, Université Paris Saclay, CNRS, 91405, Orsay, France.,CNRS UMR 8601, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, Sorbonne Paris Cité, 75006, Paris, France
| | - Katell Sénéchal-David
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Laboratoire de Chimie Inorganique, Université Paris Sud, Université Paris Saclay, CNRS, 91405, Orsay, France
| | - Amandine Dos Santos
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Laboratoire de Chimie Inorganique, Université Paris Sud, Université Paris Saclay, CNRS, 91405, Orsay, France
| | - Vincent Steinmetz
- Laboratoire de Chimie Physique, CNRS UMR 8000, Université Paris Sud, Université Paris Saclay, CNRS, 91405, Orsay, France
| | - Philippe Maître
- Laboratoire de Chimie Physique, CNRS UMR 8000, Université Paris Sud, Université Paris Saclay, CNRS, 91405, Orsay, France
| | - Jean-Noël Rebilly
- CNRS UMR 8601, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, Sorbonne Paris Cité, 75006, Paris, France
| | - Frédéric Banse
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Laboratoire de Chimie Inorganique, Université Paris Sud, Université Paris Saclay, CNRS, 91405, Orsay, France
| | - Olivia Reinaud
- CNRS UMR 8601, Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, Sorbonne Paris Cité, 75006, Paris, France
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Cantú Reinhard FG, de Visser SP. Oxygen Atom Transfer Using an Iron(IV)-Oxo Embedded in a Tetracyclic N-Heterocyclic Carbene System: How Does the Reactivity Compare to Cytochrome P450 Compound I? Chemistry 2017; 23:2935-2944. [PMID: 28052598 DOI: 10.1002/chem.201605505] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Indexed: 12/21/2022]
Abstract
N-Heterocyclic carbenes (NHC) are commonly featured as ligands in transition metal catalysis. Recently, a cyclic system containing four NHC groups with a central iron atom was synthesized and its iron(IV)-oxo species, [FeIV (O)(cNHC4 )]2+ , was characterized. This tetracyclic NHC ligand system may give the iron(IV)-oxo species unique catalytic properties as compared to traditional non-heme and heme iron ligand systems. Therefore, we performed a computational study on the structure and reactivity of the [FeIV (O)(cNHC4 )]2+ complex in substrate hydroxylation and epoxidation reactions. The reactivity patterns are compared with cytochrome P450 Compound I and non-heme iron(IV)-oxo models and it is shown that the [FeIV (O)(cNHC4 )]2+ system is an effective oxidant with oxidative power analogous to P450 Compound I. Unfortunately, in polar solvents, a solvent molecule will bind to the sixth ligand position and decrease the catalytic activity of the oxidant. A molecular orbital and valence bond analysis provides insight into the origin of the reactivity differences and makes predictions of how to further exploit these systems in chemical catalysis.
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Affiliation(s)
- Fabián G Cantú Reinhard
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Sam P de Visser
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
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31
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Lakk-Bogáth D, Csonka R, Speier G, Réglier M, Simaan AJ, Naubron JV, Giorgi M, Lázár K, Kaizer J. Formation, Characterization, and Reactivity of a Nonheme Oxoiron(IV) Complex Derived from the Chiral Pentadentate Ligand asN4Py. Inorg Chem 2016; 55:10090-10093. [PMID: 27690396 DOI: 10.1021/acs.inorgchem.6b01089] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The chiral pentadentate low-spin (S = 1) oxoiron(IV) complex [FeIV(O)(asN4Py)]2+ (2) was synthesized and spectroscopically characterized. Its formation kinetics, reactivity, and (enantio)selectivity in an oxygen-atom-transfer reaction was investigated in detail and compared to a similar pentadentate ligand-containing system.
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Affiliation(s)
- Dóra Lakk-Bogáth
- Department of Chemistry, University of Pannonia , 8201 Veszprém, Hungary
| | - Róbert Csonka
- Department of Chemistry, University of Pannonia , 8201 Veszprém, Hungary
| | - Gábor Speier
- Department of Chemistry, University of Pannonia , 8201 Veszprém, Hungary
| | - Marius Réglier
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2 UMR 7313 , 13397 Marseille, France
| | - A Jalila Simaan
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2 UMR 7313 , 13397 Marseille, France
| | - Jean-Valère Naubron
- Aix Marseille Université, CNRS, Centrale Marseille, Spectropole FR1739 , 13397 Marseille, France
| | - Michel Giorgi
- Aix Marseille Université, CNRS, Centrale Marseille, Spectropole FR1739 , 13397 Marseille, France
| | - Károly Lázár
- Research Centre for Energy, Hungarian Academy of Sciences , H-1525 Budapest, Hungary
| | - József Kaizer
- Department of Chemistry, University of Pannonia , 8201 Veszprém, Hungary
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32
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Srnec M, Wong SD, Matthews ML, Krebs C, Bollinger JM, Solomon EI. Electronic Structure of the Ferryl Intermediate in the α-Ketoglutarate Dependent Non-Heme Iron Halogenase SyrB2: Contributions to H Atom Abstraction Reactivity. J Am Chem Soc 2016; 138:5110-22. [PMID: 27021969 DOI: 10.1021/jacs.6b01151] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Low temperature magnetic circular dichroism (LT MCD) spectroscopy in combination with quantum-chemical calculations are used to define the electronic structure associated with the geometric structure of the Fe(IV)═O intermediate in SyrB2 that was previously determined by nuclear resonance vibrational spectroscopy. These studies elucidate key frontier molecular orbitals (FMOs) and their contribution to H atom abstraction reactivity. The VT MCD spectra of the enzymatic S = 2 Fe(IV)═O intermediate with Br(-) ligation contain information-rich features that largely parallel the corresponding spectra of the S = 2 model complex (TMG3tren)Fe(IV)═O (Srnec, M.; Wong, S. D.; England, J; Que, L; Solomon, E. I. Proc. Natl. Acad. Sci. USA 2012, 109, 14326-14331). However, quantitative differences are observed that correlate with π-anisotropy and oxo donor strength that perturb FMOs and affect reactivity. Due to π-anisotropy, the Fe(IV)═O active site exhibits enhanced reactivity in the direction of the substrate cavity that proceeds through a π-channel that is controlled by perpendicular orientation of the substrate C-H bond relative to the halide-Fe(IV)═O plane. Also, the increased intrinsic reactivity of the SyrB2 intermediate relative to the ferryl model complex is correlated to a higher oxyl character of the Fe(IV)═O at the transition states resulting from the weaker ligand field of the halogenase.
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Affiliation(s)
- Martin Srnec
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States .,J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences , Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Shaun D Wong
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States
| | - Megan L Matthews
- Department of Chemistry, Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Carsten Krebs
- Department of Chemistry, Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - J Martin Bollinger
- Department of Chemistry, Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University , Stanford, California 94305-5080, United States
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Jung J, Neu HM, Leeladee P, Siegler MA, Ohkubo K, Goldberg DP, Fukuzumi S. Photocatalytic Oxygenation of Substrates by Dioxygen with Protonated Manganese(III) Corrolazine. Inorg Chem 2016; 55:3218-28. [PMID: 26974004 PMCID: PMC4893963 DOI: 10.1021/acs.inorgchem.5b02019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
UV-vis spectral titrations of a manganese(III) corrolazine complex [Mn(III)(TBP8Cz)] with HOTf in benzonitrile (PhCN) indicate mono- and diprotonation of Mn(III)(TBP8Cz) to give Mn(III)(OTf)(TBP8Cz(H)) and [Mn(III)(OTf)(H2O)(TBP8Cz(H)2)][OTf] with protonation constants of 9.0 × 10(6) and 4.7 × 10(3) M(-1), respectively. The protonated sites of Mn(III)(OTf)(TBP8Cz(H)) and [Mn(III)(OTf)(H2O)(TBP8Cz(H)2)][OTf] were identified by X-ray crystal structures of the mono- and diprotonated complexes. In the presence of HOTf, the monoprotonated manganese(III) corrolazine complex [Mn(III)(OTf)(TBP8Cz(H))] acts as an efficient photocatalytic catalyst for the oxidation of hexamethylbenzene and thioanisole by O2 to the corresponding alcohol and sulfoxide with 563 and 902 TON, respectively. Femtosecond laser flash photolysis measurements of Mn(III)(OTf)(TBP8Cz(H)) and [Mn(III)(OTf)(H2O)(TBP8Cz(H)2)][OTf] in the presence of O2 revealed the formation of a tripquintet excited state, which was rapidly converted to a tripseptet excited state. The tripseptet excited state of Mn(III)(OTf)(TBP8Cz(H)) reacted with O2 with a diffusion-limited rate constant to produce the putative Mn(IV)(O2(•-))(OTf)(TBP8Cz(H)), whereas the tripseptet excited state of [Mn(III)(OTf)(H2O)(TBP8Cz(H)2)][OTf] exhibited no reactivity toward O2. In the presence of HOTf, Mn(V)(O)(TBP8Cz) can oxidize not only HMB but also mesitylene to the corresponding alcohols, accompanied by regeneration of Mn(III)(OTf)(TBP8Cz(H)). This thermal reaction was examined for a kinetic isotope effect, and essentially no KIE (1.1) was observed for the oxidation of mesitylene-d12, suggesting a proton-coupled electron transfer (PCET) mechanism is operative in this case. Thus, the monoprotonated manganese(III) corrolazine complex, Mn(III)(OTf)(TBP8Cz(H)), acts as an efficient photocatalyst for the oxidation of HMB by O2 to the alcohol.
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Affiliation(s)
- Jieun Jung
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Heather M. Neu
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Pannee Leeladee
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Maxime A. Siegler
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Kei Ohkubo
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan
| | - David P. Goldberg
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan
- Faculty of Science and Engineering, Meijo University, ALCA and SEN TAN, Japan Science and Technology Agency (JST), Nagoya, Aichi 468-0073, Japan
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Tang Z, Wang Y, Cui X, Yang Y, Tian J, Fei X, Lv S. Theoretical study of the effect of ligand topology on Fe(IV)O and Ru(IV)O complex reactivities. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kroll N, Theilacker K, Schoknecht M, Baabe D, Wiedemann D, Kaupp M, Grohmann A, Hörner G. Controlled ligand distortion and its consequences for structure, symmetry, conformation and spin-state preferences of iron(II) complexes. Dalton Trans 2015; 44:19232-47. [PMID: 26488906 DOI: 10.1039/c5dt02502h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ligand-field strength in metal complexes of polydentate ligands depends critically on how the ligand backbone places the donor atoms in three-dimensional space. Distortions from regular coordination geometries are often observed. In this work, we study the isolated effect of ligand-sphere distortion by means of two structurally related pentadentate ligands of identical donor set, in the solid state (X-ray diffraction, (57)Fe-Mössbauer spectroscopy), in solution (NMR spectroscopy, UV/Vis spectroscopy, conductometry), and with quantum-chemical methods. Crystal structures of hexacoordinate iron(II) and nickel(II) complexes derived from the cyclic ligand L(1) (6-methyl-6-(pyridin-2-yl)-1,4-bis(pyridin-2-ylmethyl)-1,4-diazepane) and its open-chain congener L(2) (N(1),N(3),2-trimethyl-2-(pyridine-2-yl)-N(1),N(3)-bis(pyridine-2-ylmethyl) propane-1,3-diamine) reveal distinctly different donor set distortions reflecting the differences in ligand topology. Distortion from regular octahedral geometry is minor for complexes of ligand L(2), but becomes significant in the complexes of the cyclic ligand L(1), where trans elongation of Fe-N bonds cannot be compensated by the rigid ligand backbone. This provokes trigonal twisting of the ligand field. This distortion causes the metal ion in complexes of L(1) to experience a significantly weaker ligand field than in the complexes of L(2), which are more regular. The reduced ligand-field strength in complexes of L(1) translates into a marked preference for the electronic high-spin state, the emergence of conformational isomers, and massively enhanced lability with respect to ligand exchange and oxidation of the central ion. Accordingly, oxoiron(IV) species derived from L(1) and L(2) differ in their spectroscopic properties and their chemical reactivity.
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Affiliation(s)
- Nicole Kroll
- Technische Universität Berlin, Institut für Chemie, Sekr. C2, Straße des 17. Juni 135, 10623 Berlin, Germany.
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Roncaroli F, Meier R. Kinetics of the reaction of nitric oxide with polypyridylamine iron(II) complexes. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1057710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Federico Roncaroli
- Departamento de Física de la Materia Condensada, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
| | - Roland Meier
- Zentrum für Angewandte Forschung, Technische Hochschule Ingolstadt, Ingolstadt, Germany
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Yi W, Yuan L, Kun Y, Zhengwen H, Jing T, Xu F, Hong G, Yong W. What factors influence the reactivity of C-H hydroxylation and C=C epoxidation by [Fe(IV)(L(ax))(1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane)(O)](n+). J Biol Inorg Chem 2015; 20:1123-34. [PMID: 26345158 DOI: 10.1007/s00775-015-1294-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 08/26/2015] [Indexed: 11/26/2022]
Abstract
Density functional theory is used to investigate geometric structures and mechanisms for hydroxylation and epoxidation from propene for four non-heme iron complexes, [Fe(IV)(L(ax))(TMC)(O)](n+), which are the inverted isomers of [Fe(IV)(O)(TMC)(Lax)](n+) (Lax = acetonitrile (AN), monoanionic trifluoroacetate (TF), azide (N3), thiolate (SR)). The Fe(IV)O unit is found to be sterically less hindered in [Fe(IV)(L(ax))(TMC)(O)](n+) than that in [Fe(IV)(O)(TMC)(L(ax))](n+). Becke, three-parameter, Lee-Yang-Parr (B3LYP) calculations show that hydroxylation and epoxidation proceed via a two-state-reactivity on competing triplet and quintet spin surfaces; and the reactions have been invariably mediated by the S = 2 state. The reaction pathways computed reveal that 2-AN is the most reactive in the four [Fe(IV)(L(ax))(TMC)(O)](n+) complexes; along the reaction pathway, the axial ligand moves away from the iron center, and thus, the energy of the LUMO decreases. The anionic axial ligand, which is more electron releasing than neutral AN, shows a strong overlap of iron orbitals. Thus, the anionic ligand does not move away from the iron center. The H-abstraction is affected by the tunneling contribution, the more electron donation power of the axial ligand, the more effect of the tunneling contribution. Adding the tunneling correction, the relative reactivity of the hydroxylation follows the trend: 2-AN > 2-SR ≈ 2-N3 > 2-TF. However, for the epoxidation, the reactivity is in the following order of 2-AN > 2-TF > 2-N3 > 2-SR. Except for 2-AN, 2-X (L(ax) = TF, N3, SR) complexes chemoselectively hydroxylate even in the presence of a C=C double bond.
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Affiliation(s)
- Wang Yi
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China.
| | - Liu Yuan
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Yang Kun
- Department of Physics, Dalian Maritime University, 1 Linghai Road, Dalian, 116026, China
| | - He Zhengwen
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Tian Jing
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Fei Xu
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Guo Hong
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Wang Yong
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
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Karamzadeh B, Singh D, Nam W, Kumar D, de Visser SP. Properties and reactivities of nonheme iron(IV)-oxo versus iron(V)-oxo: long-range electron transfer versus hydrogen atom abstraction. Phys Chem Chem Phys 2015; 16:22611-22. [PMID: 25231726 DOI: 10.1039/c4cp03053b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent work of Nam and co-workers [J. Yoon, S. A. Wilson, Y. K. Jang, M. S. Seo, K. Nehru, B. Hedman, K. O. Hodgson, E. Bill, E. I. Solomon and W. Nam, Angew. Chem., Int. Ed., 2009, 48, 1257] on a biomimetic iron complex implicated a mixture of iron(IV)-oxo and iron(V)-oxo intermediates but the latter could not be spectroscopically characterized, hence its involvement was postulated. To gain insight into the relative activity of these iron(IV)-oxo versus iron(V)-oxo intermediates, we have performed an extensive density functional theory (DFT) study on the chemical properties of the chemical system of Nam et al., namely [Fe(O)(BQEN)(NCCH3)](2+/3+) with BQEN = N,N'-dimethyl-N,N'-bis(8-quinolyl)ethane-1,2-diamine and their reactivity in hydrogen atom abstraction from ethylbenzene. We show that the perceived iron(V)-oxo species actually is an iron(IV)-oxo ligand cation radical, similar to cytochrome P450 compound I. Moreover, this intermediate has an extremely large electron affinity and therefore can abstract electrons from substrates readily. In our particular system, this means that prior to the hydrogen atom abstraction, an electron is abstracted to form an iron(IV)-oxo species, which subsequently abstracts a hydrogen atom from the substrate. Thus, our calculations show for the first time how some nonheme iron complexes react by long-range electron transfer and others directly via hydrogen atom abstraction. We have rationalized our results with detailed thermochemical cycles that explain the observed reactivity patterns.
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Affiliation(s)
- Baharan Karamzadeh
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, the University of Manchester, 131 Princess Street, Manchester M1 7DN, UK.
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Jung J, Liu S, Ohkubo K, Abu-Omar MM, Fukuzumi S. Catalytic two-electron reduction of dioxygen by ferrocene derivatives with manganese(V) corroles. Inorg Chem 2015; 54:4285-91. [PMID: 25867007 DOI: 10.1021/ic503012s] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Electron transfer from octamethylferrocene (Me8Fc) to the manganese(V) imidocorrole complex (tpfc)Mn(V)(NAr) [tpfc = 5,10,15-tris(pentafluorophenyl)corrole; Ar = 2,6-Cl2C6H3] proceeds efficiently to give an octamethylferrocenium ion (Me8Fc(+)) and [(tpfc)Mn(IV)(NAr)](-) in acetonitrile (MeCN) at 298 K. Upon the addition of trifluoroacetic acid (TFA), further reduction of [(tpfc)Mn(IV)(NAr)](-) by Me8Fc gives (tpfc)Mn(III) and ArNH2 in deaerated MeCN. TFA also results in hydrolysis of (tpfc)Mn(V)(NAr) with residual water to produce a protonated manganese(V) oxocorrole complex ([(tpfc)Mn(V)(OH)](+)) in deaerated MeCN. [(tpfc)Mn(V)(OH)](+) is rapidly reduced by 2 equiv of Me8Fc in the presence of TFA to give (tpfc)Mn(III) in deaerated MeCN. In the presence of dioxygen (O2), (tpfc)Mn(III) catalyzes the two-electron reduction of O2 by Me8Fc with TFA in MeCN to produce H2O2 and Me8Fc(+). The rate of formation of Me8Fc(+) in the catalytic reduction of O2 follows zeroth-order kinetics with respect to the concentrations of Me8Fc and TFA, whereas the rate increases linearly with increasing concentrations of (tpfc)Mn(V)(NAr) and O2. These kinetic dependencies are consistent with the rate-determining step being electron transfer from (tpfc)Mn(III) to O2, followed by further proton-coupled electron transfer from Me8Fc to produce H2O2 and [(tpfc)Mn(IV)](+). Rapid electron transfer from Me8Fc to [(tpfc)Mn(IV)](+) regenerates (tpfc)Mn(III), completing the catalytic cycle. Thus, catalytic two-electron reduction of O2 by Me8Fc with (tpfc)Mn(V)(NAr) as a catalyst precursor proceeds via a Mn(III)/Mn(IV) redox cycle.
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Affiliation(s)
- Jieun Jung
- †Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan.,‡Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Shuo Liu
- §Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Kei Ohkubo
- †Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan
| | - Mahdi M Abu-Omar
- §Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Shunichi Fukuzumi
- †Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan.,‡Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea.,∥Faculty of Science and Engineering, Meijo University, ALCA and SENTAN, Japan Science and Technology Agency (JST), Nagoya, Aichi 468-0073, Japan
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Draksharapu A, Angelone D, Quesne MG, Padamati SK, Gómez L, Hage R, Costas M, Browne WR, de Visser SP. Identification and spectroscopic characterization of nonheme iron(III) hypochlorite intermediates. Angew Chem Int Ed Engl 2015; 54:4357-61. [PMID: 25663379 PMCID: PMC4670478 DOI: 10.1002/anie.201411995] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 01/10/2015] [Indexed: 11/18/2022]
Abstract
Fe(III)-hypohalite complexes have been implicated in a wide range of important enzyme-catalyzed halogenation reactions including the biosynthesis of natural products and antibiotics and post-translational modification of proteins. The absence of spectroscopic data on such species precludes their identification. Herein, we report the generation and spectroscopic characterization of nonheme Fe(III)-hypohalite intermediates of possible relevance to iron halogenases. We show that Fe(III)-OCl polypyridylamine complexes can be sufficiently stable at room temperature to be characterized by UV/Vis absorption, resonance Raman and EPR spectroscopies, and cryo-ESIMS. DFT methods rationalize the pathways to the formation of the Fe(III)-OCl, and ultimately Fe(IV)=O, species and provide indirect evidence for a short-lived Fe(II)-OCl intermediate. The species observed and the pathways involved offer insight into and, importantly, a spectroscopic database for the investigation of iron halogenases.
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Affiliation(s)
- Apparao Draksharapu
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of GroningenNijenborgh 4, 9747 AG Groningen (The Netherlands) E-mail:
| | - Davide Angelone
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of GroningenNijenborgh 4, 9747 AG Groningen (The Netherlands) E-mail:
| | - Matthew G Quesne
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester M1 7DN (UK) E-mail:
| | - Sandeep K Padamati
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of GroningenNijenborgh 4, 9747 AG Groningen (The Netherlands) E-mail:
| | - Laura Gómez
- Departament de Química and Institute of Computational Chemistry and Catalysis (IQCC), University of GironaCampus de Montilivi, Girona 17071 (Spain)
- Serveis Tècnics de Recerca (STR), Universitat de GironaParc Científic i Tecnològic, E-17003 Girona, Spain
| | - Ronald Hage
- Catexel Ltd., BioPartner Center LeidenGalileiweg 8, 2333 BD Leiden (The Netherlands)
| | - Miquel Costas
- Departament de Química and Institute of Computational Chemistry and Catalysis (IQCC), University of GironaCampus de Montilivi, Girona 17071 (Spain)
| | - Wesley R Browne
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of GroningenNijenborgh 4, 9747 AG Groningen (The Netherlands) E-mail:
| | - Sam P de Visser
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester M1 7DN (UK) E-mail:
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Draksharapu A, Angelone D, Quesne MG, Padamati SK, Gómez L, Hage R, Costas M, Browne WR, de Visser SP. Identification and Spectroscopic Characterization of Nonheme Iron(III) Hypochlorite Intermediates. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 127:4431-4435. [PMID: 27478260 PMCID: PMC4955228 DOI: 10.1002/ange.201411995] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 01/10/2015] [Indexed: 11/07/2022]
Abstract
FeIII-hypohalite complexes have been implicated in a wide range of important enzyme-catalyzed halogenation reactions including the biosynthesis of natural products and antibiotics and post-translational modification of proteins. The absence of spectroscopic data on such species precludes their identification. Herein, we report the generation and spectroscopic characterization of nonheme FeIII-hypohalite intermediates of possible relevance to iron halogenases. We show that FeIII-OCl polypyridylamine complexes can be sufficiently stable at room temperature to be characterized by UV/Vis absorption, resonance Raman and EPR spectroscopies, and cryo-ESIMS. DFT methods rationalize the pathways to the formation of the FeIII-OCl, and ultimately FeIV=O, species and provide indirect evidence for a short-lived FeII-OCl intermediate. The species observed and the pathways involved offer insight into and, importantly, a spectroscopic database for the investigation of iron halogenases.
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Affiliation(s)
- Apparao Draksharapu
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Davide Angelone
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Matthew G. Quesne
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN (UK)
| | - Sandeep K. Padamati
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Laura Gómez
- Departament de Química and Institute of Computational Chemistry and Catalysis (IQCC), University of Girona, Campus de Montilivi, Girona 17071 (Spain)
- Serveis Tècnics de Recerca (STR), Universitat de Girona, Parc Científic i Tecnològic, E‐17003 Girona, Spain
| | - Ronald Hage
- Catexel Ltd., BioPartner Center Leiden, Galileiweg 8, 2333 BD Leiden (The Netherlands)
| | - Miquel Costas
- Departament de Química and Institute of Computational Chemistry and Catalysis (IQCC), University of Girona, Campus de Montilivi, Girona 17071 (Spain)
| | - Wesley R. Browne
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Sam P. de Visser
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN (UK)
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42
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Faponle AS, Quesne MG, Sastri CV, Banse F, de Visser SP. Differences and comparisons of the properties and reactivities of iron(III)-hydroperoxo complexes with saturated coordination sphere. Chemistry 2015; 21:1221-36. [PMID: 25399782 PMCID: PMC4316188 DOI: 10.1002/chem.201404918] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Indexed: 11/06/2022]
Abstract
Heme and nonheme monoxygenases and dioxygenases catalyze important oxygen atom transfer reactions to substrates in the body. It is now well established that the cytochrome P450 enzymes react through the formation of a high-valent iron(IV)-oxo heme cation radical. Its precursor in the catalytic cycle, the iron(III)-hydroperoxo complex, was tested for catalytic activity and found to be a sluggish oxidant of hydroxylation, epoxidation and sulfoxidation reactions. In a recent twist of events, evidence has emerged of several nonheme iron(III)-hydroperoxo complexes that appear to react with substrates via oxygen atom transfer processes. Although it was not clear from these studies whether the iron(III)-hydroperoxo reacted directly with substrates or that an initial O-O bond cleavage preceded the reaction. Clearly, the catalytic activity of heme and nonheme iron(III)-hydroperoxo complexes is substantially different, but the origins of this are still poorly understood and warrant a detailed analysis. In this work, an extensive computational analysis of aromatic hydroxylation by biomimetic nonheme and heme iron systems is presented, starting from an iron(III)-hydroperoxo complex with pentadentate ligand system (L5(2)). Direct C-O bond formation by an iron(III)-hydroperoxo complex is investigated, as well as the initial heterolytic and homolytic bond cleavage of the hydroperoxo group. The calculations show that [(L5(2))Fe(III)(OOH)](2+) should be able to initiate an aromatic hydroxylation process, although a low-energy homolytic cleavage pathway is only slightly higher in energy. A detailed valence bond and thermochemical analysis rationalizes the differences in chemical reactivity of heme and nonheme iron(III)-hydroperoxo and show that the main reason for this particular nonheme complex to be reactive comes from the fact that they homolytically split the O-O bond, whereas a heterolytic O-O bond breaking in heme iron(III)-hydroperoxo is found.
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Affiliation(s)
- Abayomi S Faponle
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester M1 7DN (UK) E-mail:
| | - Matthew G Quesne
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester M1 7DN (UK) E-mail:
| | - Chivukula V Sastri
- Department of Chemistry, Indian Institute of Technology Guwahati781039, Assam (India)
| | - Frédéric Banse
- Institut de Chimie Moleculaire et des Materiaux d'Orsay, Laboratoire de Chimie Inorganique, Université Paris-Sud11 91405 Orsay Cedex (France) E-mail:
| | - Sam P de Visser
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester M1 7DN (UK) E-mail:
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43
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Lindhorst AC, Haslinger S, Kühn FE. Molecular iron complexes as catalysts for selective C–H bond oxygenation reactions. Chem Commun (Camb) 2015; 51:17193-212. [DOI: 10.1039/c5cc07146a] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This feature article summarises recent developments in homogeneous C–H bond oxygenation catalysed by molecular iron complexes.
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Affiliation(s)
- A. C. Lindhorst
- Chair of Inorganic Chemistry/Molecular Catalysis
- Technische Universität München (TUM)
- Department of Chemistry/Catalysis Research Center
- D-85747 Garching bei München
- Germany
| | - S. Haslinger
- Chair of Inorganic Chemistry/Molecular Catalysis
- Technische Universität München (TUM)
- Department of Chemistry/Catalysis Research Center
- D-85747 Garching bei München
- Germany
| | - Fritz E. Kühn
- Chair of Inorganic Chemistry/Molecular Catalysis
- Technische Universität München (TUM)
- Department of Chemistry/Catalysis Research Center
- D-85747 Garching bei München
- Germany
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44
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Ségaud N, Anxolabéhère-Mallart E, Sénéchal-David K, Acosta-Rueda L, Robert M, Banse F. Electrochemical study of a nonheme Fe(ii) complex in the presence of dioxygen. Insights into the reductive activation of O 2 at Fe(ii) centers. Chem Sci 2015; 6:639-647. [PMID: 28936313 PMCID: PMC5588783 DOI: 10.1039/c4sc01891e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 09/16/2014] [Indexed: 01/15/2023] Open
Abstract
Recent efforts to model the reactivity of iron oxygenases have led to the generation of nonheme FeIII(OOH) and FeIV(O) intermediates from FeII complexes and O2 but using different cofactors. This diversity emphasizes the rich chemistry of nonheme Fe(ii) complexes with dioxygen. We report an original mechanistic study of the reaction of [(TPEN)FeII]2+ with O2 carried out by cyclic voltammetry. From this FeII precursor, reaction intermediates such as [(TPEN)FeIV(O)]2+, [(TPEN)FeIII(OOH)]2+ and [(TPEN)FeIII(OO)]+ have been chemically generated in high yield, and characterized electrochemically. These electrochemical data have been used to analyse and perform simulation of the cyclic voltammograms of [(TPEN)FeII]2+ in the presence of O2. Thus, several important mechanistic informations on this reaction have been obtained. An unfavourable chemical equilibrium between O2 and the FeII complex occurs that leads to the FeIII-peroxo complex upon reduction, similarly to heme enzymes such as P450. However, unlike in heme systems, further reduction of this latter intermediate does not result in O-O bond cleavage.
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Affiliation(s)
- Nathalie Ségaud
- Institut de Chimie Moléculaire et des Matériaux d'Orsay , UMR CNRS 8182 , Université Paris Sud , F-91405 Orsay Cedex , France .
| | - Elodie Anxolabéhère-Mallart
- Laboratoire d'Electrochimie Moléculaire , Université Paris Diderot , Sorbonne Paris Cité , F-75205 PARIS CEDEX 13 , France .
| | - Katell Sénéchal-David
- Institut de Chimie Moléculaire et des Matériaux d'Orsay , UMR CNRS 8182 , Université Paris Sud , F-91405 Orsay Cedex , France .
| | - Laura Acosta-Rueda
- Institut de Chimie Moléculaire et des Matériaux d'Orsay , UMR CNRS 8182 , Université Paris Sud , F-91405 Orsay Cedex , France .
| | - Marc Robert
- Laboratoire d'Electrochimie Moléculaire , Université Paris Diderot , Sorbonne Paris Cité , F-75205 PARIS CEDEX 13 , France .
| | - Frédéric Banse
- Institut de Chimie Moléculaire et des Matériaux d'Orsay , UMR CNRS 8182 , Université Paris Sud , F-91405 Orsay Cedex , France .
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45
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Kumar S, Faponle AS, Barman P, Vardhaman AK, Sastri CV, Kumar D, de Visser SP. Long-Range Electron Transfer Triggers Mechanistic Differences between Iron(IV)-Oxo and Iron(IV)-Imido Oxidants. J Am Chem Soc 2014; 136:17102-15. [DOI: 10.1021/ja508403w] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Suresh Kumar
- Department
of Applied Physics, School for Physical Sciences, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Rae Bareilly Road, Lucknow, 226025 Uttar Pradesh, India
| | - Abayomi S. Faponle
- Manchester
Institute of Biotechnology and School of Chemical Engineering and
Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Prasenjit Barman
- Department
of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Anil Kumar Vardhaman
- Department
of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Chivukula V. Sastri
- Department
of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Devesh Kumar
- Department
of Applied Physics, School for Physical Sciences, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Rae Bareilly Road, Lucknow, 226025 Uttar Pradesh, India
| | - Sam P. de Visser
- Manchester
Institute of Biotechnology and School of Chemical Engineering and
Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
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46
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Cook SA, Ziller JW, Borovik AS. Iron(II) complexes supported by sulfonamido tripodal ligands: endogenous versus exogenous substrate oxidation. Inorg Chem 2014; 53:11029-35. [PMID: 25264932 PMCID: PMC4203402 DOI: 10.1021/ic501531g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
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High-valent
iron species are known to act as powerful oxidants in both natural
and synthetic systems. While biological enzymes have evolved to prevent
self-oxidation by these highly reactive species, development of organic
ligand frameworks that are capable of supporting a high-valent iron
center remains a challenge in synthetic chemistry. We describe here
the reactivity of an Fe(II) complex that is supported by a tripodal
sulfonamide ligand with both dioxygen and an oxygen-atom transfer
reagent, 4-methylmorpholine-N-oxide (NMO). An Fe(III)–hydroxide
complex is obtained from reaction with dioxygen, while NMO gives
an Fe(III)–alkoxide product resulting from activation of a
C–H bond of the ligand. Inclusion of Ca2+ ions in
the reaction with NMO prevented this ligand activation and resulted
in isolation of an Fe(III)–hydroxide complex in which the Ca2+ ion is coordinated to the tripodal sulfonamide ligand and
the hydroxo ligand. Modification of the ligand allowed the Fe(III)–hydroxide
complex to be isolated from NMO in the absence of Ca2+ ions,
and a C–H bond of an external substrate could be activated
during the reaction. This study highlights the importance of robust
ligand design in the development of synthetic catalysts that utilize
a high-valent iron center. Oxidation of an
Fe(II) complex supported by a sulfonamido tripodal ligand was explored
with dioxygen and an O-atom transfer reagent. While dioxygen gave
an Fe(III)−hydroxido complex, the O-atom transfer reagent resulted
in C−H activation of the ligand to form an Fe(III)−alkoxide
species. Modification of the ligand prevented this ligand oxidation
and allowed for activation of C−H bonds on an external substrate.
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Affiliation(s)
- Sarah A Cook
- Department of Chemistry, University of California-Irvine , 1102 Natural Sciences II, Irvine, California 92697, United States
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47
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Hitomi Y, Arakawa K, Kodera M. Synthesis, stability and reactivity of the first mononuclear nonheme oxoiron(iv) species with monoamido ligation: a putative reactive species generated from iron-bleomycin. Chem Commun (Camb) 2014; 50:7485-7. [DOI: 10.1039/c4cc01409j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Lassalle-Kaiser B, Boron TT, Krewald V, Kern J, Beckwith MA, Schroeder H, Alonso-Mori R, Nordlund D, Weng TC, Sokaras D, Neese F, Bergmann U, Yachandra VK, DeBeer S, Pecoraro VL, Yano J. Experimental and computational X-ray emission spectroscopy as a direct probe of protonation states in oxo-bridged Mn(IV) dimers relevant to redox-active metalloproteins. Inorg Chem 2013; 52:12915-22. [PMID: 24161081 PMCID: PMC3867288 DOI: 10.1021/ic400821g] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The protonation state of oxo bridges in nature is of profound importance for a variety of enzymes, including the Mn4CaO5 cluster of photosystem II and the Mn2O2 cluster in Mn catalase. A set of dinuclear bis-μ-oxo-bridged Mn(IV) complexes in different protonation states was studied by Kβ emission spectroscopy to form the foundation for unraveling the protonation states in the native complex. The valence-to-core regions (valence-to-core XES) of the spectra show significant changes in intensity and peak position upon protonation. DFT calculations were performed to simulate the valence-to-core XES spectra and to assign the spectral features to specific transitions. The Kβ(2,5) peaks arise primarily from the ligand 2p to Mn 1s transitions, with a characteristic low energy shoulder appearing upon oxo-bridge protonation. The satellite Kβ" peak provides a more direct signature of the protonation state change, since the transitions originating from the 2s orbitals of protonated and unprotonated μ-oxo bridges dominate this spectral region. The energies of the Kβ" features differ by ~3 eV and thus are well resolved in the experimental spectra. Additionally, our work explores the chemical resolution limits of the method, namely, whether a mixed (μ-O)(μ-OH2) motif can be distinguished from a symmetric (μ-OH)2 one. The results reported here highlight the sensitivity of Kβ valence-to-core XES to single protonation state changes of bridging ligands, and form the basis for further studies of oxo-bridged polymetallic complexes and metalloenzyme active sites. In a complementary paper, the results from X-ray absorption spectroscopy of the same Mn(IV) dimer series are discussed.
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Affiliation(s)
- Benedikt Lassalle-Kaiser
- Physical Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Thaddeus T. Boron
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Vera Krewald
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Jan Kern
- Physical Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Martha A. Beckwith
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
| | - Henning Schroeder
- Physical Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | | | - Dennis Nordlund
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Tsu-Chien Weng
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Uwe Bergmann
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Vittal K. Yachandra
- Physical Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
| | - Vincent L. Pecoraro
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Junko Yano
- Physical Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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49
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Latifi R, Sainna MA, Rybak-Akimova EV, de Visser SP. Does Hydrogen-Bonding Donation to Manganese(IV)-Oxo and Iron(IV)-Oxo Oxidants Affect the Oxygen-Atom Transfer Ability? A Computational Study. Chemistry 2013; 19:4058-68. [DOI: 10.1002/chem.201202811] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Revised: 11/16/2012] [Indexed: 12/21/2022]
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50
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Ségaud N, Rebilly JN, Sénéchal-David K, Guillot R, Billon L, Baltaze JP, Farjon J, Reinaud O, Banse F. Iron Coordination Chemistry with New Ligands Containing Triazole and Pyridine Moieties. Comparison of the Coordination Ability of the N-Donors. Inorg Chem 2013; 52:691-700. [DOI: 10.1021/ic301834x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Nathalie Ségaud
- Institut de
Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, F-91405 Orsay, France
| | - Jean-Noël Rebilly
- Laboratoire de Chimie et de
Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR 8601, F-75270 Paris Cedex
06, France
| | - Katell Sénéchal-David
- Institut de
Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, F-91405 Orsay, France
| | - Régis Guillot
- Institut de
Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, F-91405 Orsay, France
| | - Laurianne Billon
- Institut de
Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, F-91405 Orsay, France
| | - Jean-Pierre Baltaze
- Institut de
Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, F-91405 Orsay, France
| | - Jonathan Farjon
- Institut de
Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, F-91405 Orsay, France
| | - Olivia Reinaud
- Laboratoire de Chimie et de
Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR 8601, F-75270 Paris Cedex
06, France
| | - Frédéric Banse
- Institut de
Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, F-91405 Orsay, France
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