1
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Deolka S, Govindarajan R, Khaskin E, Vasylevskyi S, Bahri J, Fayzullin RR, Roy MC, Khusnutdinova JR. Oxygen transfer reactivity mediated by nickel perfluoroalkyl complexes using molecular oxygen as a terminal oxidant. Chem Sci 2023; 14:7026-7035. [PMID: 37389265 PMCID: PMC10306096 DOI: 10.1039/d3sc01861j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/03/2023] [Indexed: 07/01/2023] Open
Abstract
Nickel perfluoroethyl and perfluoropropyl complexes supported by naphthyridine-type ligands show drastically different aerobic reactivity from their trifluoromethyl analogs resulting in facile oxygen transfer to perfluoroalkyl groups or oxygenation of external organic substrates (phosphines, sulfides, alkenes and alcohols) using O2 or air as a terminal oxidant. Such mild aerobic oxygenation occurs through the formation of spectroscopically detected transient high-valent NiIII and structurally characterized mixed-valent NiII-NiIV intermediates and radical intermediates, resembling O2 activation reported for some Pd dialkyl complexes. This reactivity is in contrast with the aerobic oxidation of naphthyridine-based Ni(CF3)2 complexes resulting in the formation of a stable NiIII product, which is attributed to the effect of greater steric congestion imposed by longer perfluoroalkyl chains.
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Affiliation(s)
- Shubham Deolka
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - R Govindarajan
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Eugene Khaskin
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Serhii Vasylevskyi
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Janet Bahri
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Robert R Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences 8 Arbuzov Street Kazan 420088 Russian Federation
| | - Michael C Roy
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Julia R Khusnutdinova
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
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2
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Lee B, Pabst TP, Hierlmeier G, Chirik PJ. Exploring the Effect of Pincer Rigidity on Oxidative Addition Reactions with Cobalt(I) Complexes. Organometallics 2023; 42:708-718. [PMID: 37223209 PMCID: PMC10201995 DOI: 10.1021/acs.organomet.3c00079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Abstract
Cobalt complexes containing the 2,6-diaminopyridine-substituted PNP pincer (iPrPNMeNP = 2,6-(iPr2PNMe)2(C5H3N)) were synthesized. A combination of solid-state structures and investigation of the cobalt(I)/(II) redox potential established a relatively rigid and electron-donating chelating ligand as compared to iPrPNP (iPrPNP = 2,6-(iPr2PCH2)2(C5H3N)). Based on a buried volume analysis, the two pincer ligands are sterically indistinguishable. Nearly planar, diamagnetic, four-coordinate complexes were observed independent of the field strength (chloride, alkyl, aryl) of the fourth ligand completing the coordination sphere of the metal. Computational studies supported a higher barrier for C-H oxidative addition, largely a result of the increased rigidity of the pincer. The increased oxidative addition barrier resulted in stabilization of (iPrPNMeNP)Co(I) complexes, enabling the characterization of the cobalt boryl and the cobalt hydride dimer by X-ray crystallography. Moreover, (iPrPNMeNP)CoMe served as an efficient precatalyst for alkene hydroboration likely because of the reduced propensity to undergo oxidative addition, demonstrating that reactivity and catalytic performance can be tuned by rigidity of pincer ligands.
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Affiliation(s)
- Boran Lee
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Tyler P Pabst
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Gabriele Hierlmeier
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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3
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Cha J, Lee E, Yandulov DV. Mechanistic Studies for Pd(II)(O 2) Reduction Generating Pd(0) and H 2O: Formation of Pd(OH) 2 as a Key Intermediate. Inorg Chem 2022; 61:14544-14552. [PMID: 36050901 DOI: 10.1021/acs.inorgchem.2c01139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecular oxygen (O2) remains to be an ideal yet underutilized feedstock for the oxidative transformation of organic substrates and renewable energy systems such as fuel cells. Palladium (Pd) has shown particular promise in enabling these applications. The present study describes a Pd-mediated O2 reduction to water via C-H activation of 9,10-dihydroanthracene (DHA) by a Pd(II) η2-peroxo complex 1O2. The reaction yields stoichiometric anthracene and Pd(0) product 1 and is notable in two respects. First, plots of concentrations of the reaction participants over time have distinctly sigmoidal shapes, indicating that conversion accelerates over time and implying autocatalysis. Second, the reaction proceeds via a genuine monometallic Pd(II) dihydroxide 1(OH)2 directly observed to grow and decay as an intermediate. Confirming its role as an intermediate, the dihydroxide 1(OH)2 was found to mediate C-H oxidation of DHA on par in activity with the peroxo compound 1O2. Mechanistic studies with density functional theory (DFT) calculations suggested that both 1O2 and 1(OH)2 react with DHA by hydrogen atom transfer (HAT) and that autocatalysis in the 1O2 reaction results from oxidative addition of the initial Pd(II) complex 1O2 to the Pd(0) product 1. This reaction forms a transient bis(μ-oxo) Pd(II) dimer 1O21 that is more active in the HAT oxidation of DHA than the initial 1O2.
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Affiliation(s)
- Jeongmin Cha
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Eunsung Lee
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea.,Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Dmitry V Yandulov
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States.,Department of Biology and Biotechnology, National Research University Higher School of Economics, Moscow 117418, Russia
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4
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Ayyappan R, Abdalghani I, Da Costa RC, Owen GR. Recent developments on the transformation of CO 2 utilising ligand cooperation and related strategies. Dalton Trans 2022; 51:11582-11611. [PMID: 35839074 DOI: 10.1039/d2dt01609e] [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
A portfolio of value-added chemicals, fuels and building block compounds can be envisioned from CO2 on an industrial scale. The high kinetic and thermodynamic stabilities of CO2, however, present a significant barrier to its utilisation as a C1 source. In this context, metal-ligand cooperation methodologies have emerged as one of the most dominant strategies for the transformation of the CO2 molecule over the last decade or so. This review focuses on the advancements in CO2 transformation using these cooperative methodologies. Different and well-studied ligand cooperation methodologies, such as dearomatisation-aromatisation type cooperation, bimetallic cooperation (M⋯M'; M' = main group or transition metal) and other related strategies are also discussed. Furthermore, the cooperative bond activations are subdivided based on the number of atoms connecting the reactive centre in the ligand framework (spacer/linker length) and the transition metal. Several similarities across these seemingly distinct cooperative methodologies are emphasised. Finally, this review brings out the challenges ahead in developing catalytic systems from these CO2 transformations.
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Affiliation(s)
- Ramaraj Ayyappan
- School of Applied Science, University of South Wales, Treforest, CF37 4AT, UK.
| | - Issam Abdalghani
- School of Applied Science, University of South Wales, Treforest, CF37 4AT, UK.
| | | | - Gareth R Owen
- School of Applied Science, University of South Wales, Treforest, CF37 4AT, UK.
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5
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Ho SKY, Lam FYT, de Aguirre A, Maseras F, White AJP, Britovsek GJP. Photolytic Activation of Late-Transition-Metal–Carbon Bonds and Their Reactivity toward Oxygen. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sarah K. Y. Ho
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, 80 Wood Lane, London W12 0BZ, United Kingdom
| | - Francis Y. T. Lam
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, 80 Wood Lane, London W12 0BZ, United Kingdom
| | - Adiran de Aguirre
- Institute of Chemical Research of Catalonia, The Barcelona Institute for Science and Technology, Avgda. Països Catalans, 16, Tarragona 43007, Catalonia, Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia, The Barcelona Institute for Science and Technology, Avgda. Països Catalans, 16, Tarragona 43007, Catalonia, Spain
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, 80 Wood Lane, London W12 0BZ, United Kingdom
| | - George J. P. Britovsek
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, 80 Wood Lane, London W12 0BZ, United Kingdom
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6
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Etim UJ, Bai P, Gazit OM, Zhong Z. Low-Temperature Heterogeneous Oxidation Catalysis and Molecular Oxygen Activation. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1919044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ubong J. Etim
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
| | - Peng Bai
- College of Chemical Engineering, China University of Petroleum, Qingdao, China
| | - Oz M. Gazit
- Wolfson Faculty of Chemical Engineering, Technion – Israel Institute of Technology, Haifa, Israel
| | - Ziyi Zhong
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
- Technion Israel Institute of Technology (IIT), Haifa, Israel
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7
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Gu S, Musgrave CB, Gehman ZM, Zhang K, Dickie DA, Goddard WA, Gunnoe TB. Rhodium and Iridium Complexes Bearing “Capping Arene” Ligands: Synthesis and Characterization. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00250] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shunyan Gu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Charles B. Musgrave
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, United States
| | - Zoë M. Gehman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Ke Zhang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - William A. Goddard
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, United States
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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8
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Barber T, Argent SP, Ball LT. Expanding Ligand Space: Preparation, Characterization, and Synthetic Applications of Air-Stable, Odorless Di-tert-alkylphosphine Surrogates. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01414] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Thomas Barber
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham NG7 2TU, U.K
| | - Stephen P. Argent
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Liam T. Ball
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham NG7 2TU, U.K
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9
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Watt FA, Krishna A, Golovanov G, Ott H, Schoch R, Wölper C, Neuba AG, Hohloch S. Monoanionic Anilidophosphine Ligand in Lanthanide Chemistry: Scope, Reactivity, and Electrochemistry. Inorg Chem 2020; 59:2719-2732. [PMID: 31961137 DOI: 10.1021/acs.inorgchem.9b03071] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We present the synthesis of a series of new lanthanide(III) complexes supported by a monoanionic bidentate anilidophosphine ligand (N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide, short PN-). The work comprises the characterization of a variety of heteroleptic complexes containing either one or two PN ligands as well as a study on further functionalization possibilities. The new heteroleptic complexes cover selected examples over the whole lanthanide(III) series including lanthanum, cerium, neodymium, gadolinium, terbium, dysprosium, and lutetium. In case of the two diamagnetic metal cations lanthanum(III) and lutetium(III), we have furthermore studied the influence of the lanthanide ion (early vs. late) on the reactivity of these complexes. Thereby we found that the radius of the lanthanide ion has a major influence on the reactivity. Using sterically demanding, multidentate ligand systems, e.g., cyclopentadienide (Cp-), we found that the lanthanum complex La(PN)2Cl (1-La) reacts well to the corresponding cyclopentadienide complex, while for Lu(PN)2Cl (1-Lu) no reaction was observed under any conditions tested. On the contrary, employing monodentate ligands such as mesitolate, thiomesitolate, 2,4,6-trimethylanilide or 2,4,6-trimethylphenylphosphide, results in the clean formation of the desired complexes for both lanthanum and lutetium. All complexes have been studied by various techniques, including multi nuclear NMR spectroscopy and X-ray crystallography. 31P NMR spectroscopy was furthermore used to evaluate the presence of open coordination sites on the complexes using coordinating and noncoordinating solvents, and as a probe for estimating the Ce-P distance in the corresponding complexes. Additionally, we present cyclic voltammetry (CV) data for Ce(PN)2Cl (1-Ce), La(PN)2Cl (1-La), Ce(PN)(HMDS)2 (8-Ce) and La(PN)(HMDS)2 (8-La) (with HMDS = hexamethyldisilazide, (Me3Si)2N-) exploring the potential of the anilidophosphane ligand framework to stabilize a potential Ce(IV) ion.
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Affiliation(s)
- Fabian A Watt
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Athul Krishna
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Grigoriy Golovanov
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Holger Ott
- Training Center, Bruker AXS GmbH, Östliche Rheinbrückenstraße 49, 76187 Karlsruhe, Germany
| | - Roland Schoch
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Christoph Wölper
- Faculty of Chemistry, University of Essen-Duisburg, Universitätsstraße 5-7, 45141 Essen, Germany
| | - Adam G Neuba
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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10
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Recent advances in the chemistry of group 9—Pincer organometallics. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2019.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Abril P, Del Río MP, López JA, Lledós A, Ciriano MA, Tejel C. Inner-Sphere Oxygen Activation Promoting Outer-Sphere Nucleophilic Attack on Olefins. Chemistry 2019; 25:14546-14554. [PMID: 31432579 DOI: 10.1002/chem.201903068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/19/2019] [Indexed: 01/18/2023]
Abstract
Alkoxylation and hydroxylation reactions of 1,5-cyclooctadiene (cod) in an iridium complex with alcohols and water promoted by the reduction of oxygen to hydrogen peroxide are described. The exo configuration of the OH/OR groups in the products agrees with nucleophilic attack at the external face of the olefin as the key step. The reactions also require the presence of a coordinating protic acid (such as picolinic acid (Hpic)) and involve the participation of a cationic diolefin iridium(III) complex, [Ir(cod)(pic)2 ]+ , which has been isolated. Independently, this cation is also involved in easy alkoxy group exchange reactions, which are very unusual for organic ethers. DFT studies on the mechanism of olefin alkoxylation mediated by oxygen show a low-energy proton-coupled electron-transfer step connecting a superoxide-iridium(II) complex with hydroperoxide-iridium(III) intermediates, rather than peroxide complexes. Accordingly, a more complex reaction, with up to four different products, occurred upon reacting the diolefin-peroxide iridium(III) complex with Hpic. Moreover, such hydroperoxide intermediates are the origin of the regio- and stereoselectivity of the hydroxylation/alkoxylation reactions. If this protocol is applied to the diolefin-rhodium(I) complex [Rh(pic)(cod)], free alkyl ethers ORC8 H11 (R=Me, Et) resulted, and the reaction is enantioselective if a chiral amino acid, such as l-proline, is used instead of Hpic.
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Affiliation(s)
- Paula Abril
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - M Pilar Del Río
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
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12
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Palermo AP, Schöttle C, Zhang S, Grosso-Giordano NA, Okrut A, Dixon DA, Frei H, Gates BC, Katz A. Spectroscopic Characterization of μ-η1:η1-Peroxo Ligands Formed by Reaction of Dioxygen with Electron-Rich Iridium Clusters. Inorg Chem 2019; 58:14338-14348. [DOI: 10.1021/acs.inorgchem.9b01529] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew P. Palermo
- Department of Chemical Engineering, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Christian Schöttle
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
| | - Shengjie Zhang
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Nicolás A. Grosso-Giordano
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
| | - Alexander Okrut
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Heinz Frei
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, University of California at Berkeley, Berkeley, California 94720, United States
| | - Bruce C. Gates
- Department of Chemical Engineering, University of California at Davis, One Shields Avenue, Davis, California 95616, United States
| | - Alexander Katz
- Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, California 94720-1462, United States
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13
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Wright AM, Pahls DR, Gary JB, Warner T, Williams JZ, M Knapp SM, Allen KE, Landis CR, Cundari TR, Goldberg KI. Experimental and Computational Investigation of the Aerobic Oxidation of a Late Transition Metal-Hydride. J Am Chem Soc 2019; 141:10830-10843. [PMID: 31259542 DOI: 10.1021/jacs.9b04706] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The rational development of homogeneous catalytic systems for selective aerobic oxidations of organics has been hampered by the limited available knowledge of how oxygen reacts with important organometallic intermediates. Recently, several mechanisms for oxygen insertion into late transition metal-hydride bonds have been described. Contributing to this nascent understanding of how oxygen reacts with metal-hydrides, a detailed mechanistic study of the reaction of oxygen with the IrIII hydride complex (dmPhebox)Ir(OAc)(H) (1) in the presence of acetic acid, which proceeds to form the IrIII complex (dmPhebox)Ir(OAc)2(OH2) (2), is described. The evidence supports a multifaceted mechanism wherein a small amount of an initially formed metal hydroperoxide proceeds to generate a metal-oxyl species that then initiates a radical chain reaction to rapidly convert the remaining IrIII-H. Insight into the initiation step was gained through kinetic and mechanistic studies of the radical chain inhibition by BHT (butylated hydroxytoluene). Computational studies were employed to contribute to a further understanding of initiation and propagation in this system.
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Affiliation(s)
- Ashley M Wright
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195-1700 , United States
| | - Dale R Pahls
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling (CASCaM) , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , United States
| | - J Brannon Gary
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling (CASCaM) , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , United States.,Department of Chemistry and Biochemistry , Stephen F. Austin State University , P.O. Box 13006, SFA Station , Nacogdoches , Texas 75962-3006 , United States
| | - Theresa Warner
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling (CASCaM) , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , United States
| | - Jacob Z Williams
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling (CASCaM) , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , United States
| | - Spring Melody M Knapp
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53719 , United States
| | - Kate E Allen
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195-1700 , United States
| | - Clark R Landis
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53719 , United States
| | - Thomas R Cundari
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling (CASCaM) , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , United States
| | - Karen I Goldberg
- Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195-1700 , United States.,Department of Chemistry , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
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14
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Takeshita T, Nakajima Y. Deprotonation of a PNNP-Iron Complex: Expanding the Concept of Metal-ligand Cooperation to the PNNP-Iron System. CHEM LETT 2019. [DOI: 10.1246/cl.181027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tomohiro Takeshita
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Yumiko Nakajima
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
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15
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Del Río MP, Abril P, López JA, Sodupe M, Lledós A, Ciriano MA, Tejel C. Activating a Peroxo Ligand for C-O Bond Formation. Angew Chem Int Ed Engl 2019; 58:3037-3041. [PMID: 30589172 DOI: 10.1002/anie.201808840] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 11/24/2018] [Indexed: 12/12/2022]
Abstract
Dioxygen activation for effective C-O bond formation in the coordination sphere of a metal is a long-standing challenge in chemistry for which the design of catalysts for oxygenations is slowed down by the complicated, and sometimes poorly understood, mechanistic panorama. In this context, olefin-peroxide complexes could be valuable models for the study of such reactions. Herein, we showcase the isolation of rare "Ir(cod)(peroxide)" complexes (cod=1,5-cyclooctadiene) from reactions with oxygen, and then the activation of the peroxide ligand for O-O bond cleavage and C-O bond formation by transfer of a hydrogen atom through proton transfer/electron transfer reactions to give 2-iradaoxetane complexes and water. 2,4,6-Trimethylphenol, 1,4-hydroquinone, and 1,4-cyclohexadiene were used as hydrogen atom donors. These reactions can be key steps in the oxy-functionalization of olefins with oxygen, and they constitute a novel mechanistic pathway for iridium, whose full reaction profile is supported by DFT calculations.
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Affiliation(s)
- M Pilar Del Río
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009-, Zaragoza, Spain
| | - Paula Abril
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009-, Zaragoza, Spain
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009-, Zaragoza, Spain
| | - Mariona Sodupe
- Departament de Química, Universitat Autónoma de Barcelona, Cerdanyola del Vallès, 08193-, Barcelona, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autónoma de Barcelona, Cerdanyola del Vallès, 08193-, Barcelona, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009-, Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009-, Zaragoza, Spain
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16
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17
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Hermosilla P, López P, García-Orduña P, Lahoz FJ, Polo V, Casado MA. Amido Complexes of Iridium with a PNP Pincer Ligand: Reactivity toward Alkynes and Hydroamination Catalysis. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00365] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Pablo Hermosilla
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Pablo López
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Pilar García-Orduña
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Fernando J. Lahoz
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento de Química Física and Instituto de Biocomputación y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
| | - Miguel A. Casado
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12 50009, Zaragoza, Spain
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18
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Feller M, Ben-Ari E, Diskin-Posner Y, Milstein D. CO2 activation by metal−ligand-cooperation mediated by iridium pincer complexes. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1475662] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Moran Feller
- Departments of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Eyal Ben-Ari
- Departments of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Yael Diskin-Posner
- Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel
| | - David Milstein
- Departments of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel
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19
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Hu S, Xiao W, Yang W, Yang J, Fang Y, Xiong J, Luo Z, Deng H, Guo Y, Zhang L, Ding J. Molecular O 2 Activation over Cu(I)-Mediated C≡N Bond for Low-Temperature CO Oxidation. ACS APPLIED MATERIALS & INTERFACES 2018; 10:17167-17174. [PMID: 29682956 DOI: 10.1021/acsami.8b02367] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The activation of molecular oxygen (O2) is extremely crucial in heterogeneous oxidations for various industrial applications. Here, a charge-transfer complex CuTCNQ nanowire (CuTCNQ NW) array grown on the copper foam was first reported to show CO catalytic oxidation activity at a temperature below 200 °C with the activated O2 as an oxidant. The molecular O2 was energetically activated over the Cu(I)-mediated C≡N bond with a lower energy of -1.167 eV and preferentially reduced to •O2- through one-electron transfer during the activation process by density functional theory calculations and electron paramagnetic resonance. The theoretical calculations indicated that the CO molecule was oxidized by the activated O2 on the CuTCNQ NW surface via the Eley-Rideal mechanism, which had been further confirmed by in situ diffuse reflectance infrared Fourier transform spectra. These results indicated that the local C≡N bond electron-state engineering could effectively improve the molecular O2 activation efficiency, which facilitates the low-temperature CO catalytic oxidation. The findings reported here enhance our understanding on the molecular oxygen activation pathway over metal-organic nanocatalysts and provide a new avenue for rational design of novel low-cost, organic-based heterogeneous catalysts.
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Affiliation(s)
- Siyu Hu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Wen Xiao
- Department of Materials Science and Engineering , National University of Singapore , 117575 , Singapore
| | - Weiwei Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Ji Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Yarong Fang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Juxia Xiong
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Zhu Luo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Hongtao Deng
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Yanbing Guo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental and Applied Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Jun Ding
- Department of Materials Science and Engineering , National University of Singapore , 117575 , Singapore
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20
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Oren D, Diskin-Posner Y, Avram L, Feller M, Milstein D. Metal-Ligand Cooperation as Key in Formation of Dearomatized Ni II-H Pincer Complexes and in Their Reactivity toward CO and CO 2. Organometallics 2018; 37:2217-2221. [PMID: 31080304 PMCID: PMC6503609 DOI: 10.1021/acs.organomet.8b00160] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Indexed: 11/28/2022]
Abstract
![]()
The
unique synthesis and reactivity of [(RPNP*)NiH]
complexes (1a,b), based on metal–ligand
cooperation (MLC), are presented (RPNP* = deprotonated
PNP ligand, R = iPr, tBu). Unexpectedly, the
dearomatized complexes 1a,b were obtained
by reduction of the dicationic complexes [(RPNP)Ni(MeCN)](BF4)2 with sodium amalgam or by reaction of the free
ligand with Ni0(COD)2. Complex 1b reacts with CO via MLC, to give a rare case of a distorted-octahedral
PNP-based pincer complex, the Ni(0) complex 3b. Complexes 1a,b also react with CO2 via MLC to
form a rare example of η1 binding of CO2 to nickel, complexes 4a,b. An unusual
CO2 cleavage process by complex 4b, involving
C–O and C–P cleavage and C–C bond formation,
led to the Ni–CO complex 3b and to the new complex
[(PiPr2NC2O2)Ni(P(O)iPr2)] (5b). All complexes have been
fully characterized by NMR and X-ray crystallography.
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Affiliation(s)
- Dror Oren
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yael Diskin-Posner
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Liat Avram
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Moran Feller
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - David Milstein
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
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21
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Leipzig BK, Rees JA, Kowalska JK, Theisen RM, Kavčič M, Poon PCY, Kaminsky W, DeBeer S, Bill E, Kovacs JA. How Do Ring Size and π-Donating Thiolate Ligands Affect Redox-Active, α-Imino-N-heterocycle Ligand Activation? Inorg Chem 2018; 57:1935-1949. [PMID: 29411979 DOI: 10.1021/acs.inorgchem.7b02748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Considerable effort has been devoted to the development of first-row transition-metal catalysts containing redox-active imino-pyridine ligands that are capable of storing multiple reducing equivalents. This property allows abundant and inexpensive first-row transition metals, which favor sequential one-electron redox processes, to function as competent catalysts in the concerted two-electron reduction of substrates. Herein we report the syntheses and characterization of a series of iron complexes that contain both π-donating thiolate and π-accepting (α-imino)-N-heterocycle redox-active ligands, with progressively larger N-heterocycle rings (imidazole, pyridine, and quinoline). A cooperative interaction between these complementary redox-active ligands is shown to dictate the properties of these complexes. Unusually intense charge-transfer (CT) bands, and intraligand metrical parameters, reminiscent of a reduced (α-imino)-N-heterocycle ligand (L•-), initially suggested that the electron-donating thiolate had reduced the N-heterocycle. Sulfur K-edge X-ray absorption spectroscopic (XAS) data, however, provides evidence for direct communication, via backbonding, between the thiolate sulfur and the formally orthogonal (α-imino)-N-heterocycle ligand π*-orbitals. DFT calculations provide evidence for extensive delocalization of bonds over the sulfur, iron, and (α-imino)-N-heterocycle, and TD-DFT shows that the intense optical CT bands involve transitions between a mixed Fe/S donor, and (α-imino)-N-heterocycle π*-acceptor orbital. The energies and intensities of the optical and S K-edge pre-edge XAS transitions are shown to correlate with N-heterocycle ring size, as do the redox potentials. When the thiolate is replaced with a thioether, or when the low-spin S = 0 Fe(II) is replaced with a high-spin S = 3/2 Co(II), the N-heterocycle ligand metrical parameters and electronic structure do not change relative to the neutral L0 ligand. With respect to the development of future catalysts containing redox-active ligands, the energy cost of storing reducing equivalents is shown to be lowest when a quinoline, as opposed to imidazole or pyridine, is incorporated into the ligand backbone of the corresponding Fe complex.
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Affiliation(s)
- Benjamin K Leipzig
- The Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195-1700, United States
| | - Julian A Rees
- The Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195-1700, United States
| | - Joanna K Kowalska
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Roslyn M Theisen
- The Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195-1700, United States
| | | | | | - Werner Kaminsky
- The Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195-1700, United States
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Julie A Kovacs
- The Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195-1700, United States
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22
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Dunn PL, Carlson RK, Gagliardi L, Tonks IA. Structure and bonding of group 4-nickel heterobimetallics supported by 2-(diphenylphosphino)pyrrolide ligands. Dalton Trans 2018; 45:9892-901. [PMID: 26952589 DOI: 10.1039/c6dt00431h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a full series of group 4/nickel complexes supported by a 2-(diphenylphosphino)pyrrolide (NP) ligand is reported. Treatment of the homoleptic, 8-coordinate M(NP)4 monometallic precursors with Ni(COD)2 (COD = 1,5-cyclooctadiene) yielded the heterobimetallic complexes (κ(2)-NP)M(μ2-NP)3Ni (M = Ti, Zr, Hf). Although X-ray crystallographic analysis reveals similarly short metal-metal distances in all three complexes, quantum chemical calculations indicate that ZrNi () and HfNi () contain only single Ni → M dative bonds while TiNi () has an additional Ti-Ni π-bond. All three complexes have quasireversible reductions by cyclic voltammetry, and 1-electron chemical reduction of by Na(Hg) yields the anion, [Na][(κ(2)-NP)Ti(μ2-NP)3Ni] (). X-ray and computational analysis indicate that the 1-electron reduction of completely breaks the metal-metal bond, yielding a formally Ti(III)-Ni(0) complex. Ti-Ni bonding can also be disrupted by coordination of CO, wherein Ni → CO backbonding effectively outcompetes Ni → Ti dative bonding.
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Affiliation(s)
- Peter L Dunn
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA.
| | - Rebecca K Carlson
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA. and Supercomputing Institute and Chemical Theory Center, University of Minnesota, Minneapolis, MN 55455, USA
| | - Laura Gagliardi
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA. and Supercomputing Institute and Chemical Theory Center, University of Minnesota, Minneapolis, MN 55455, USA
| | - Ian A Tonks
- Department of Chemistry, University of Minnesota - Twin Cities, 207 Pleasant St SE, Minneapolis, MN 55455, USA.
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23
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Hooe SL, Rheingold AL, Machan CW. Electrocatalytic Reduction of Dioxygen to Hydrogen Peroxide by a Molecular Manganese Complex with a Bipyridine-Containing Schiff Base Ligand. J Am Chem Soc 2018; 140:3232-3241. [PMID: 29216711 DOI: 10.1021/jacs.7b09027] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The synthesis and electrocatalytic reduction of dioxygen by a molecular manganese(III) complex with a tetradentate dianionic bipyridine-based ligand is reported. Electrochemical characterization indicates a Nernstian dependence on the added proton source for the reduction of Mn(III) to Mn(II). The resultant species is competent for the reduction of dioxygen to H2O2 with 81 ± 4% Faradaic efficiency. Mechanistic studies suggest that the catalytically active species has been generated through the interaction of the added proton donor and the parent Mn complex, resulting in the protonation of a coordinated phenolate moiety following the single-electron reduction, generating a neutral species with a vacant coordination site at the metal center. As a consequence, the active catalyst has a pendent proton source in close proximity to the active site for subsequent intramolecular reactions.
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Affiliation(s)
- Shelby L Hooe
- Department of Chemistry , University of Virginia , McCormick Road P.O. Box 400319, Charlottesville , Virginia 22904-4319 , United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093-0358 , United States
| | - Charles W Machan
- Department of Chemistry , University of Virginia , McCormick Road P.O. Box 400319, Charlottesville , Virginia 22904-4319 , United States
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24
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Nelson DJ, Nolan SP. Hydroxide complexes of the late transition metals: Organometallic chemistry and catalysis. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.10.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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25
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Luque-Urrutia JA, Poater A. The Fundamental Noninnocent Role of Water for the Hydrogenation of Nitrous Oxide by PNP Pincer Ru-based Catalysts. Inorg Chem 2017; 56:14383-14387. [DOI: 10.1021/acs.inorgchem.7b02630] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jesús A. Luque-Urrutia
- Institut de Química
Computacional i Catàlisi and Departament de Química, Universitat de Girona, Campus Montilivi, 17003 Girona, Catalonia, Spain
| | - Albert Poater
- Institut de Química
Computacional i Catàlisi and Departament de Química, Universitat de Girona, Campus Montilivi, 17003 Girona, Catalonia, Spain
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26
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Gair JJ, Qiu Y, Chan NH, Filatov AS, Lewis JC. Rhodium Complexes of 2,6-Bis(dialkylphosphinomethyl)pyridines: Improved C–H Activation, Expanded Reaction Scope, and Catalytic Direct Arylation. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00532] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph J. Gair
- Department of Chemistry, University of Chicago, Chicago Illinois 60637, United States
| | - Yehao Qiu
- Department of Chemistry, University of Chicago, Chicago Illinois 60637, United States
| | - Natalie H. Chan
- Department of Chemistry, University of Chicago, Chicago Illinois 60637, United States
| | - Alexander S. Filatov
- Department of Chemistry, University of Chicago, Chicago Illinois 60637, United States
| | - Jared C. Lewis
- Department of Chemistry, University of Chicago, Chicago Illinois 60637, United States
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27
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Zabula AV, Qiao Y, Kosanovich AJ, Cheisson T, Manor BC, Carroll PJ, Ozerov OV, Schelter EJ. Structure, Electronics and Reactivity of Ce(PNP) Complexes. Chemistry 2017; 23:17923-17934. [DOI: 10.1002/chem.201703174] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Alexander V. Zabula
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia PA 19104 USA
| | - Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia PA 19104 USA
| | - Alex J. Kosanovich
- Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77842 USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia PA 19104 USA
| | - Brian C. Manor
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia PA 19104 USA
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia PA 19104 USA
| | - Oleg V. Ozerov
- Department of Chemistry Texas A&M University 3255 TAMU College Station TX 77842 USA
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th Street Philadelphia PA 19104 USA
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28
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Polezhaev AV, Chen C, Losovyj Y, Caulton KG. A Multifunctional Pincer Ligand Supports Unsaturated Cobalt: Five Functionalities in One Pincer. Chemistry 2017; 23:8039-8050. [DOI: 10.1002/chem.201700859] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Indexed: 11/10/2022]
Affiliation(s)
| | - Chun‐Hsing Chen
- Department of Chemistry Indiana University Bloomington Bloomington IN 47405 USA
| | - Yaroslav Losovyj
- Department of Chemistry Indiana University Bloomington Bloomington IN 47405 USA
| | - Kenneth G. Caulton
- Department of Chemistry Indiana University Bloomington Bloomington IN 47405 USA
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29
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Dauth A, Gellrich U, Diskin-Posner Y, Ben-David Y, Milstein D. The Ferraquinone-Ferrahydroquinone Couple: Combining Quinonic and Metal-Based Reactivity. J Am Chem Soc 2017; 139:2799-2807. [PMID: 28141925 PMCID: PMC5330656 DOI: 10.1021/jacs.6b13050] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
A ferraquinone–ferrahydroquinone
organometallic redox couple
was prepared and characterized. Intricate cooperativity of the metal
was observed with different positions on the ligand. This allowed
cooperative activation of small molecules like molecular hydrogen,
oxygen, and bromine. Likewise, dehydrogenation of alcohols was achieved
through 1,6 metal–ligand cooperation.
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Affiliation(s)
- Alexander Dauth
- Department of Organic Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science , Rehovot 76100, Israel
| | - Urs Gellrich
- Department of Organic Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science , Rehovot 76100, Israel
| | - Yael Diskin-Posner
- Department of Organic Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science , Rehovot 76100, Israel
| | - Yehoshoa Ben-David
- Department of Organic Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science , Rehovot 76100, Israel
| | - David Milstein
- Department of Organic Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science , Rehovot 76100, Israel
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30
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Huang W, Diaconescu PL. Reactivity and Properties of Metal Complexes Enabled by Flexible and Redox-Active Ligands with a Ferrocene Backbone. Inorg Chem 2016; 55:10013-10023. [DOI: 10.1021/acs.inorgchem.6b01118] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Wenliang Huang
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E Young Drive East, Los Angeles, California 90095, United States
| | - Paula L. Diaconescu
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E Young Drive East, Los Angeles, California 90095, United States
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31
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Anaby A, Feller M, Ben-David Y, Leitus G, Diskin-Posner Y, Shimon LJW, Milstein D. Bottom-Up Construction of a CO2-Based Cycle for the Photocarbonylation of Benzene, Promoted by a Rhodium(I) Pincer Complex. J Am Chem Soc 2016; 138:9941-50. [DOI: 10.1021/jacs.6b05128] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Aviel Anaby
- Departments
of †Organic Chemistry and ‡Chemical Research
Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Moran Feller
- Departments
of †Organic Chemistry and ‡Chemical Research
Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yehoshoa Ben-David
- Departments
of †Organic Chemistry and ‡Chemical Research
Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Gregory Leitus
- Departments
of †Organic Chemistry and ‡Chemical Research
Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yael Diskin-Posner
- Departments
of †Organic Chemistry and ‡Chemical Research
Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Linda J. W. Shimon
- Departments
of †Organic Chemistry and ‡Chemical Research
Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - David Milstein
- Departments
of †Organic Chemistry and ‡Chemical Research
Support, Weizmann Institute of Science, Rehovot 76100, Israel
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Feller M, Gellrich U, Anaby A, Diskin-Posner Y, Milstein D. Reductive Cleavage of CO2 by Metal–Ligand-Cooperation Mediated by an Iridium Pincer Complex. J Am Chem Soc 2016; 138:6445-54. [DOI: 10.1021/jacs.6b00202] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Moran Feller
- Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Urs Gellrich
- Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Aviel Anaby
- Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yael Diskin-Posner
- Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - David Milstein
- Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
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Batke S, Kothe T, Haas M, Wadepohl H, Ballmann J. Diamidophosphines with six-membered chelates and their coordination chemistry with group 4 metals: development of a trimethylene-methane-tethered [PN2]-type "molecular claw". Dalton Trans 2016; 45:3528-40. [PMID: 26804587 DOI: 10.1039/c5dt04911c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coordination chemistry of the phosphine-tethered diamidophosphine ligands PhP(CH2CH2CH2NHPh)2 (pr[NPN]H2) and PhP(1,2-CH2-C6H4-NHSiMe3)2 (bn[NPN]H2) featuring six-membered N–C3–P chelates was explored with group 4 metals, which allowed for the consecutive development of a new trimethylene-methane-tethered [PN2] scaffold. In the case of the propylene-linked system pr[NPN]H2, access to the sparingly soluble dibenzyl derivative pr[NPN]ZrBn2 (3-Zr) was gained, while thermally sensitive zirconium and hafnium diiodo complexes bn[NPN]MI2 (5-M, M = Zr, Hf) were isolated in the case of the benzylene-linked derivative bn[NPN]H2. Despite the related phosphine-tethered backbone architectures of both of these ligands, their group 4 complexes were found to exhibit either C1-symmetric (bn[NPN]MX2) or averaged CS-symmetric (pr[NPN]MX2) structures in solution. To restrain the overall flexibility of these systems and thereby control the properties of the resulting complexes without disrupting the six-membered chelates, the new trimethylene-methane-tethered N,N′-di-(tert-butyl)-substituted [PN2]H2 protioligand was designed. This tripodal ligand system was prepared on a gram scale and its CS-symmetric dichloro complexes [PN2]MCl2 (6-M, M = Ti, Zr, Hf) were isolated subsequently. The benzene-soluble dibenzyl derivative [PN2]ZrBn2 (7-Zr) was synthesised as well and characterised by X-ray diffraction. These results are discussed not only in conjunction with the known [NPN]-coordinated group 4 complexes incorporating five-membered chelates, but also in the context of “molecular claws” that are related to the new [PN2] tripod.
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Affiliation(s)
- S Batke
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany.
| | - T Kothe
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany.
| | - M Haas
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany.
| | - H Wadepohl
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany.
| | - J Ballmann
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany.
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Tang Z, Tejel C, Martinez de Sarasa Buchaca M, Lutz M, van der Vlugt JI, de Bruin B. Reactivity of Me-pma RhIand IrIComplexes upon Deprotonation and Their Application in Catalytic Carbene Carbonylation Reactions. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501302] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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35
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Sánchez P, Hernández-Juárez M, Álvarez E, Paneque M, Rendón N, Suárez A. Synthesis, structure and reactivity of Pd and Ir complexes based on new lutidine-derived NHC/phosphine mixed pincer ligands. Dalton Trans 2016; 45:16997-17009. [DOI: 10.1039/c6dt03652j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel proton-responsive lutidine-derived CNP ligands having a flexible Py–CH2–NHC linkage adopt mer and fac coordination modes.
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Affiliation(s)
- Práxedes Sánchez
- Instituto de Investigaciones Químicas (IIQ)
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- CSIC and Universidad de Sevilla
- Sevilla
- Spain
| | - Martín Hernández-Juárez
- Instituto de Investigaciones Químicas (IIQ)
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- CSIC and Universidad de Sevilla
- Sevilla
- Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas (IIQ)
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- CSIC and Universidad de Sevilla
- Sevilla
- Spain
| | - Margarita Paneque
- Instituto de Investigaciones Químicas (IIQ)
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- CSIC and Universidad de Sevilla
- Sevilla
- Spain
| | - Nuria Rendón
- Instituto de Investigaciones Químicas (IIQ)
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- CSIC and Universidad de Sevilla
- Sevilla
- Spain
| | - Andrés Suárez
- Instituto de Investigaciones Químicas (IIQ)
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- CSIC and Universidad de Sevilla
- Sevilla
- Spain
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Schiwek C, Meiners J, Förster M, Würtele C, Diefenbach M, Holthausen MC, Schneider S. Oxygen Reduction with a Bifunctional Iridium Dihydride Complex. Angew Chem Int Ed Engl 2015; 54:15271-5. [PMID: 26511744 DOI: 10.1002/anie.201504369] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 09/07/2015] [Indexed: 11/06/2022]
Abstract
The iridium dihydride [Ir(H)2 (HPNP)](+) (PNP=N(CH2 CH2 PtBu2 )2 ) reacts with O2 to give the unusual, square-planar iridium(III) hydroxide [Ir(OH)(PNP)](+) and water. Regeneration of the dihydride with H2 closes a quasi-catalytic synthetic oxygen-reduction reaction (ORR) cycle that can be run several times. Experimental and computational examinations are in agreement with an oxygenation mechanism via rate-limiting O2 coordination followed by H-transfer at a single metal site, facilitated by the cooperating pincer ligand. Hence, the four electrons required for the ORR are stored within the two covalent MH bonds of a mononuclear metal complex.
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Affiliation(s)
- Christoph Schiwek
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany)
| | - Jenni Meiners
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany)
| | - Moritz Förster
- Insitut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Str. 7, 60438 Frankfurt am Main (Germany)
| | - Christian Würtele
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany)
| | - Martin Diefenbach
- Insitut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Str. 7, 60438 Frankfurt am Main (Germany)
| | - Max C Holthausen
- Insitut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Str. 7, 60438 Frankfurt am Main (Germany).
| | - Sven Schneider
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany).
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Sandhya KS, Remya GS, Suresh CH. Pincer Ligand Modifications To Tune the Activation Barrier for H2 Elimination in Water Splitting Milstein Catalyst. Inorg Chem 2015; 54:11150-6. [PMID: 26575086 DOI: 10.1021/acs.inorgchem.5b01471] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Modifications on the ligand environment of Milstein ruthenium(II) pincer hydride catalysts have been proposed to fine-tune the activation free energy, ΔG(⧧) for the key step of H2 elimination in the water splitting reaction. This study conducted at the B3LYP level of density functional theory including the solvation effect reveals that changing the bulky t-butyl group at the P-arm of the pincer ligand by methyl or ethyl group can reduce the ΔG(⧧) by a substantial margin, ∼ 10 kcal/mol. The reduction in the steric effect of the pincer ligand causes exothermic association of the water molecule to the metal center and leads to significant stabilization of all the subsequent reaction intermediates and the transition state compared to those of the original Milstein catalyst that promotes endothermic association of the water molecule. Though electron donating groups on the pyridyl unit of the pincer ligand are advantageous for reducing the activation barrier in the gas phase, the effect is only 1-1.4 kcal/mol compared to that of an electron withdrawing group. The absolute minimum of the electrostatic potential at the hydride ligand and carbonyl stretching frequency of the catalyst are useful parameters to gauge the effect of ligand environment on the H2 elimination step of the water splitting reaction.
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Affiliation(s)
- Karakkadparambil S Sandhya
- Inorganic and Theoretical Chemistry Section, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019, India
| | - Geetha S Remya
- Inorganic and Theoretical Chemistry Section, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019, India
| | - Cherumuttathu H Suresh
- Inorganic and Theoretical Chemistry Section, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019, India
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Schiwek C, Meiners J, Förster M, Würtele C, Diefenbach M, Holthausen MC, Schneider S. Oxygen Reduction with a Bifunctional Iridium Dihydride Complex. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504369] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Khusnutdinova JR, Milstein D. Metal-Ligand Cooperation. Angew Chem Int Ed Engl 2015; 54:12236-73. [DOI: 10.1002/anie.201503873] [Citation(s) in RCA: 783] [Impact Index Per Article: 87.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Indexed: 12/25/2022]
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Bernal MJ, Martín M, Sola E. Arene and Hydride Complexes of Ruthenium withfacPSiP Pincer Ligands. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500539] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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