1
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Raj M, Padhi SK. Water Oxidation by a Neoteric Dinuclear Mn(II) Electrocatalyst in Aqueous Medium. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Manaswini Raj
- Indian Institute of Technology (Indian School of Mines): Indian Institute of Technology Chemistry and Chemical Biology INDIA
| | - Sumanta Kumar Padhi
- Indian Institute of Technology (Indian School of Mines), Dhanbad Department of Chemistry and Chemical Biology Science BlockDepartment of Chemistry and Chemical Biology 826004 Dhanbad INDIA
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2
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Ji G, Zhao L, Wei J, Cai J, He C, Du Z, Cai W, Duan C. A Metal–Organic Framework as a Multiphoton Excitation Regulator for the Activation of Inert C(sp
3
)−H Bonds and Oxygen. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Guanfeng Ji
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Liang Zhao
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Jianwei Wei
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Junkai Cai
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Cheng He
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Zenggang Du
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Wei Cai
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
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3
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Ji G, Zhao L, Wei J, Cai J, He C, Du Z, Cai W, Duan C. A Metal-Organic Framework as a Multiphoton Excitation Regulator for the Activation of Inert C(sp 3 )-H Bonds and Oxygen. Angew Chem Int Ed Engl 2021; 61:e202114490. [PMID: 34747102 DOI: 10.1002/anie.202114490] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Indexed: 11/07/2022]
Abstract
The activation and oxidization of inert C(sp3 )-H bonds into value-added chemicals affords attractively economic and ecological benefits as well as central challenge in modern chemistry. Inspired by the natural enzymatic transformation, herein, we report a new multiphoton excitation approach to activate the inert C(sp3 )-H bonds and oxygen by integrating the photoinduced electron transfer (PET), ligand-to-metal charge transfer (LMCT) and hydrogen atom transfer (HAT) events together into one metal-organic framework. The well-modified nicotinamide adenine dinucleotide (NAD+ ) mimics oxidized CeIII -OEt moieties to generate CeIV -OEt chromophore and its reduced state mimics NAD. via PET. The in situ formed CeIV -OEt moiety triggers a LMCT excitation to form the alkoxy radical EtO. , abstracts a hydrogen atom from the C(sp3 )-H bond, accompanying the recovery of CeIII -OEt and the formation of alkyl radicals. The formed NAD. activates oxygen to regenerate the NAD+ for next recycle, wherein, the activated oxygen species interacts with the intermediates for the oxidization functionalization, paving a catalytic avenue for developing scalable and sustainable synthetic strategy.
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Affiliation(s)
- Guanfeng Ji
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Liang Zhao
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Jianwei Wei
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Junkai Cai
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Cheng He
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Zenggang Du
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Wei Cai
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
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4
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Massie AA, Denler MC, Singh R, Sinha A, Nordlander E, Jackson TA. Structural Characterization of a Series of N5-Ligated Mn IV -Oxo Species. Chemistry 2020; 26:900-912. [PMID: 31693757 PMCID: PMC7388070 DOI: 10.1002/chem.201904434] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/23/2019] [Indexed: 11/05/2022]
Abstract
Analysis of extended X-ray absorption fine structure (EXAFS) data for the MnIV -oxo complexes [MnIV (O)(DMM N4py)]2+ , [MnIV (O)(2pyN2B)]2+ , and [MnIV (O)(2pyN2Q)]2+ (DMM N4py=N,N-bis(4-methoxy-3,5-dimethyl-2-pyridylmethyl)-N-bis(2-pyridyl)methylamine; 2pyN2B=(N-bis(1-methyl-2-benzimidazolyl)methyl-N-(bis-2-pyridylmethyl)amine, and 2pyN2Q=N,N-bis(2-pyridyl)-N,N-bis(2-quinolylmethyl)methanamine) afforded Mn=O and Mn-N bond lengths. The Mn=O distances for [MnIV (O)(DMM N4py)]2+ and [MnIV (O)(2pyN2B)]2+ are 1.72 and 1.70 Å, respectively. In contrast, the Mn=O distance for [MnIV (O)(2pyN2Q)]2+ was significantly longer (1.76 Å). We attribute this long distance to sample heterogeneity, which is reasonable given the reduced stability of [MnIV (O)(2pyN2Q)]2+ . The Mn=O distances for [MnIV (O)(DMM N4py)]2+ and [MnIV (O)(2pyN2B)]2+ could only be well-reproduced using DFT-derived models that included strong hydrogen-bonds between second-sphere solvent 2,2,2-trifluoroethanol molecules and the oxo ligand. These results suggest an important role for the 2,2,2-trifluoroethanol solvent in stabilizing MnIV -oxo adducts. The DFT methods were extended to investigate the structure of the putative [MnIV (O)(N4py)]2+ ⋅(HOTf)2 adduct. These computations suggest that a MnIV -hydroxo species is most consistent with the available experimental data.
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Affiliation(s)
- Allyssa A. Massie
- The University of Kansas, Department of Chemistry and Center for Environmentally Beneficial Catalysis, 1567 Irving Hill Road, Lawrence, KS 66045, USA
| | - Melissa C. Denler
- The University of Kansas, Department of Chemistry and Center for Environmentally Beneficial Catalysis, 1567 Irving Hill Road, Lawrence, KS 66045, USA
| | - Reena Singh
- Lund University, Chemical Physics, Department of Chemistry, Box 124, SE-221 00 Lund, Sweden
| | - Arup Sinha
- Lund University, Chemical Physics, Department of Chemistry, Box 124, SE-221 00 Lund, Sweden
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore - 632014 Tamil Nadu, India
| | - Ebbe Nordlander
- Lund University, Chemical Physics, Department of Chemistry, Box 124, SE-221 00 Lund, Sweden
| | - Timothy A. Jackson
- The University of Kansas, Department of Chemistry and Center for Environmentally Beneficial Catalysis, 1567 Irving Hill Road, Lawrence, KS 66045, USA
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5
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Massie AA, Sinha A, Parham JD, Nordlander E, Jackson TA. Relationship between Hydrogen-Atom Transfer Driving Force and Reaction Rates for an Oxomanganese(IV) Adduct. Inorg Chem 2018; 57:8253-8263. [PMID: 29974738 DOI: 10.1021/acs.inorgchem.8b00852] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Hydrogen atom transfer (HAT) reactions by high-valent metal-oxo intermediates are important in both biological and synthetic systems. While the HAT reactivity of FeIV-oxo adducts has been extensively investigated, studies of analogous MnIV-oxo systems are less common. There are several recent reports of MnIV-oxo complexes, supported by neutral pentadentate ligands, capable of cleaving strong C-H bonds at rates approaching those of analogous FeIV-oxo species. In this study, we provide a thorough analysis of the HAT reactivity of one of these MnIV-oxo complexes, [MnIV(O)(2pyN2Q)]2+, which is supported by an N5 ligand with equatorial pyridine and quinoline donors. This complex is able to oxidize the strong C-H bonds of cyclohexane with rates exceeding those of FeIV-oxo complexes with similar ligands. In the presence of excess oxidant (iodosobenzene), cyclohexane oxidation by [MnIV(O)(2pyN2Q)]2+ is catalytic, albeit with modest turnover numbers. Because the rate of cyclohexane oxidation by [MnIV(O)(2pyN2Q)]2+ was faster than that predicted by a previously published Bells-Evans-Polanyi correlation, we expanded the scope of this relationship by determining HAT reaction rates for substrates with bond dissociation energies spanning 20 kcal/mol. This extensive analysis showed the expected correlation between reaction rate and the strength of the substrate C-H bond, albeit with a shallow slope. The implications of this result with regard to MnIV-oxo and FeIV-oxo reactivity are discussed.
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Affiliation(s)
- Allyssa A Massie
- The University of Kansas , Chemistry Department , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045 , United States
| | - Arup Sinha
- Lund University , Chemical Physics, Department of Chemistry , Box 124, SE-221 00 Lund , Sweden
| | - Joshua D Parham
- The University of Kansas , Chemistry Department , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045 , United States
| | - Ebbe Nordlander
- Lund University , Chemical Physics, Department of Chemistry , Box 124, SE-221 00 Lund , Sweden
| | - Timothy A Jackson
- The University of Kansas , Chemistry Department , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045 , United States
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6
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Jeong D, Yan JJ, Noh H, Hedman B, Hodgson KO, Solomon EI, Cho J. Oxidation of Naphthalene with a Manganese(IV) Bis(hydroxo) Complex in the Presence of Acid. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Donghyun Jeong
- Department of Emerging Materials Science DGIST Daegu 42988 Korea
| | - James J. Yan
- Department of Chemistry Stanford University Stanford CA 94305 USA
| | - Hyeonju Noh
- Department of Emerging Materials Science DGIST Daegu 42988 Korea
| | - Britt Hedman
- Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center Menlo Park CA 94025 USA
| | - Keith O. Hodgson
- Department of Chemistry Stanford University Stanford CA 94305 USA
- Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center Menlo Park CA 94025 USA
| | - Edward I. Solomon
- Department of Chemistry Stanford University Stanford CA 94305 USA
- Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center Menlo Park CA 94025 USA
| | - Jaeheung Cho
- Department of Emerging Materials Science DGIST Daegu 42988 Korea
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7
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Jeong D, Yan JJ, Noh H, Hedman B, Hodgson KO, Solomon EI, Cho J. Oxidation of Naphthalene with a Manganese(IV) Bis(hydroxo) Complex in the Presence of Acid. Angew Chem Int Ed Engl 2018; 57:7764-7768. [PMID: 29701293 PMCID: PMC6013404 DOI: 10.1002/anie.201802641] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/05/2018] [Indexed: 11/06/2022]
Abstract
Naphthalene oxidation with metal-oxygen intermediates is a difficult reaction in environmental and biological chemistry. Herein, we report that a MnIV bis(hydroxo) complex, which was fully characterized by various physicochemical methods, such as ESI-MS, UV/Vis, and EPR analysis, X-ray diffraction, and XAS, can be employed for the oxidation of naphthalene in the presence of acid to afford 1,4-naphthoquinone. Redox titration of the MnIV bis(hydroxo) complex gave a one-electron reduction potential of 1.09 V, which is the most positive potential for all reported nonheme MnIV bis(hydroxo) species as well as MnIV oxo analogues. Kinetic studies, including kinetic isotope effect analysis, suggest that the naphthalene oxidation occurs through a rate-determining electron transfer process.
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Affiliation(s)
- Donghyun Jeong
- Department of Emerging Materials Science, DGIST, Daegu, 42988, Korea
| | - James J Yan
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Hyeonju Noh
- Department of Emerging Materials Science, DGIST, Daegu, 42988, Korea
| | - Britt Hedman
- Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, CA, 94025, USA
| | - Keith O Hodgson
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
- Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, CA, 94025, USA
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
- Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, CA, 94025, USA
| | - Jaeheung Cho
- Department of Emerging Materials Science, DGIST, Daegu, 42988, Korea
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8
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Massie AA, Denler MC, Cardoso LT, Walker AN, Hossain MK, Day VW, Nordlander E, Jackson TA. Equatorial Ligand Perturbations Influence the Reactivity of Manganese(IV)‐Oxo Complexes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612309] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | | | | | - M. Kamal Hossain
- Chemical Physics Department of Chemistry Lund University Box 124 22100 Lund Sweden
| | - Victor W. Day
- Department of Chemistry University of Kansas Lawrence KS USA
| | - Ebbe Nordlander
- Chemical Physics Department of Chemistry Lund University Box 124 22100 Lund Sweden
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9
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Massie AA, Denler MC, Cardoso LT, Walker AN, Hossain MK, Day VW, Nordlander E, Jackson TA. Equatorial Ligand Perturbations Influence the Reactivity of Manganese(IV)-Oxo Complexes. Angew Chem Int Ed Engl 2017; 56:4178-4182. [PMID: 28300349 DOI: 10.1002/anie.201612309] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/03/2017] [Indexed: 11/06/2022]
Abstract
Manganese(IV)-oxo complexes are often invoked as intermediates in Mn-catalyzed C-H bond activation reactions. While many synthetic MnIV -oxo species are mild oxidants, other members of this class can attack strong C-H bonds. The basis for these reactivity differences is not well understood. Here we describe a series of MnIV -oxo complexes with N5 pentadentate ligands that modulate the equatorial ligand field of the MnIV center, as assessed by electronic absorption, electron paramagnetic resonance, and Mn K-edge X-ray absorption methods. Kinetic experiments show dramatic rate variations in hydrogen-atom and oxygen-atom transfer reactions, with faster rates corresponding to weaker equatorial ligand fields. For these MnIV -oxo complexes, the rate enhancements are correlated with both 1) the energy of a low-lying 4 E excited state, which has been postulated to be involved in a two-state reactivity model, and 2) the MnIII/IV reduction potentials.
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Affiliation(s)
- Allyssa A Massie
- Department of Chemistry, University of Kansas, Lawrence, KS, USA
| | - Melissa C Denler
- Department of Chemistry, University of Kansas, Lawrence, KS, USA
| | | | - Ashlie N Walker
- Department of Chemistry, University of Kansas, Lawrence, KS, USA
| | - M Kamal Hossain
- Chemical Physics, Department of Chemistry, Lund University, Box 124, 22100, Lund, Sweden
| | - Victor W Day
- Department of Chemistry, University of Kansas, Lawrence, KS, USA
| | - Ebbe Nordlander
- Chemical Physics, Department of Chemistry, Lund University, Box 124, 22100, Lund, Sweden
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10
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Li YY, Ye K, Siegbahn PEM, Liao RZ. Mechanism of Water Oxidation Catalyzed by a Mononuclear Manganese Complex. CHEMSUSCHEM 2017; 10:903-911. [PMID: 27925413 DOI: 10.1002/cssc.201601538] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/01/2016] [Indexed: 06/06/2023]
Abstract
The design and synthesis of biomimetic Mn complexes to catalyze oxygen evolution is a very appealing goal because water oxidation in nature employs a Mn complex. Recently, the mononuclear Mn complex [LMnII (H2 O)2 ]2+ [1, L=Py2 N(tBu)2 , Py=pyridyl] was reported to catalyze water oxidation electrochemically at an applied potential of 1.23 V at pH 12.2 in aqueous solution. Density functional calculations were performed to elucidate the mechanism of water oxidation promoted by this catalyst. The calculations showed that 1 can lose two protons and one electron readily to produce [LMnIII (OH)2 ]+ (2), which then undergoes two sequential proton-coupled electron-transfer processes to afford [LMnV OO]+ (4). The O-O bond formation can occur through direct coupling of the two oxido ligands or through nucleophilic attack of water. These two mechanisms have similar barriers of approximately 17 kcal mol-1 . The further oxidation of 4 to generate [LMnVI OO]2+ (5), which enables O-O bond formation, has a much higher barrier. In addition, ligand degradation by C-H activation has a similar barrier to that for the O-O bond formation, and this explains the relatively low turnover number of this catalyst.
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Affiliation(s)
- Ying-Ying Li
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Ke Ye
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Per E M Siegbahn
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691, Stockholm, Sweden
| | - Rong-Zhen Liao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
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11
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Engelmann X, Monte-Pérez I, Ray K. Oxidationsreaktionen mit bioinspirierten einkernigen Nicht-Häm-Oxidometallkomplexen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600507] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xenia Engelmann
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Inés Monte-Pérez
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Kallol Ray
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
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12
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Engelmann X, Monte-Pérez I, Ray K. Oxidation Reactions with Bioinspired Mononuclear Non-Heme Metal-Oxo Complexes. Angew Chem Int Ed Engl 2016; 55:7632-49. [DOI: 10.1002/anie.201600507] [Citation(s) in RCA: 207] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/15/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Xenia Engelmann
- Department of Chemistry; Humboldt-Universität zu Berlin; Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Inés Monte-Pérez
- Department of Chemistry; Humboldt-Universität zu Berlin; Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Kallol Ray
- Department of Chemistry; Humboldt-Universität zu Berlin; Brook-Taylor-Strasse 2 12489 Berlin Germany
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13
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Barman P, Vardhaman AK, Martin B, Wörner SJ, Sastri CV, Comba P. Influence of ligand architecture on oxidation reactions by high-valent nonheme manganese oxo complexes using water as a source of oxygen. Angew Chem Int Ed Engl 2014; 54:2095-9. [PMID: 25557423 DOI: 10.1002/anie.201409476] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 11/17/2014] [Indexed: 11/07/2022]
Abstract
Mononuclear nonheme Mn(IV)=O complexes with two isomers of a bispidine ligand have been synthesized and characterized by various spectroscopies and density functional theory (DFT). The Mn(IV)=O complexes show reactivity in oxidation reactions (hydrogen-atom abstraction and sulfoxidation). Interestingly, one of the isomers (L(1) ) is significantly more reactive than the other (L(2) ), while in the corresponding Fe(IV)=O based oxidation reactions the L(2) -based system was previously found to be more reactive than the L(1) -based catalyst. This inversion of reactivities is discussed on the basis of DFT and molecular mechanics (MM) model calculations, which indicate that the order of reactivities are primarily due to a switch of reaction channels (σ versus π) and concomitant steric effects.
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Affiliation(s)
- Prasenjit Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam, 781039 (India)
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14
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Barman P, Vardhaman AK, Martin B, Wörner SJ, Sastri CV, Comba P. Influence of Ligand Architecture on Oxidation Reactions by High-Valent Nonheme Manganese Oxo Complexes Using Water as a Source of Oxygen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409476] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Dong JJ, Unjaroen D, Mecozzi F, Harvey EC, Saisaha P, Pijper D, de Boer JW, Alsters P, Feringa BL, Browne WR. Manganese-catalyzed selective oxidation of aliphatic C-H groups and secondary alcohols to ketones with hydrogen peroxide. CHEMSUSCHEM 2013; 6:1774-1778. [PMID: 24009102 DOI: 10.1002/cssc.201300378] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 06/23/2013] [Indexed: 06/02/2023]
Abstract
An efficient and simple method for selective oxidation of secondary alcohols and oxidation of alkanes to ketones is reported. An in situ prepared catalyst is employed based on manganese(II) salts, pyridine-2-carboxylic acid, and butanedione, which provides good-to-excellent conversions and yields with high turnover numbers (up to 10 000) with H2 O2 as oxidant at ambient temperatures. In substrates bearing multiple alcohol groups, secondary alcohols are converted to ketones selectively and, in general, benzyl C-H oxidation proceeds in preference to aliphatic C-H oxidation.
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Affiliation(s)
- Jia Jia Dong
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen (The Netherlands), Fax: (+31) 50-363-4296
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16
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El Kadiri MY, El Ghachtouli S, Guillot R, Billon L, Charlot MF, Framery E, Andrioletti B, Aukauloo A. Chemical activation of a mononuclear non-porphyrinic manganese complex using water as oxygen source for the oxygen atom transfer reaction. CHEMSUSCHEM 2012; 5:2147-2150. [PMID: 23047587 DOI: 10.1002/cssc.201200440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 08/07/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Moulay Youness El Kadiri
- Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires-ICBMS, UMR CNRS 5246, Université Claude Bernard Lyon-1, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne, France
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17
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Lanucara F, Crestoni ME. Biomimetic Oxidation Reactions of a Naked Manganese(V)-Oxo Porphyrin Complex. Chemistry 2011; 17:12092-100. [DOI: 10.1002/chem.201101432] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Indexed: 12/14/2022]
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18
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Wanke R, Benisvy L, Kuznetsov ML, Guedes da Silva MFC, Pombeiro AJL. Persistent Hydrogen-Bonded and Non-Hydrogen-Bonded Phenoxyl Radicals. Chemistry 2011; 17:11882-92. [DOI: 10.1002/chem.201101509] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Indexed: 11/10/2022]
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