1
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McKee ML. Exploring the Reaction Mechanism of C-H Oxidation by Copper-Salen Complexes. J Phys Chem A 2022; 126:4969-4980. [PMID: 35861503 DOI: 10.1021/acs.jpca.2c03344] [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
The mechanism of C-H oxidation of propylene (C3H6) and 1-phenyl-1-pentyne (C3H7-C≡C-Ph) by HOOR (R═Me, tBu) and 3O2 by a copper-salen complex was explored by computations. The most noteworthy step is the complexation of two Cu salens to the peroxide to form either the LCuOH/LCuOR pair or an OH-bridged complex LCu(μ-OH)CuL plus OR. The latter pathway involves an avoided crossing of two triplet electronic states. The LCuOH complex can abstract a hydrogen atom from C3H6 and the C3H5 radical plus 3O2 forms the complex LCuOOC3H5. Migration of a hydrogen to the proximal oxygen atom reforms LCuOH and acrolein HC(O)CH═CH2.
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Affiliation(s)
- Michael L McKee
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama36849, United States
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2
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Theoretical perspective on mononuclear copper-oxygen mediated C–H and O–H activations: A comparison between biological and synthetic systems. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63974-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Lan Z, Toney J, Mallikarjun Sharada S. A computational mechanistic study of CH hydroxylation with mononuclear copper–oxygen complexes. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01128j] [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 computational study of methane hydroxylation by oxygen-bound monocopper complexes.
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Affiliation(s)
- Zhenzhuo Lan
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, USA
| | - Jacob Toney
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, USA
| | - Shaama Mallikarjun Sharada
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, USA
- Department of Chemistry, University of Southern California, Los Angeles, CA, USA
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4
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Jeon H, Oh H, Hong S. Synthesis, characterization and catalytic activity of a mononuclear nonheme copper(II)-iodosylbenzene adduct. J Inorg Biochem 2021; 223:111524. [PMID: 34218127 DOI: 10.1016/j.jinorgbio.2021.111524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/11/2021] [Accepted: 06/25/2021] [Indexed: 10/21/2022]
Abstract
Iodosylbenzene (PhIO) and its derivatives have attracted significant attention due to their various applications in organic synthesis and biomimetic studies. For example, PhIO has been extensively used for generating high-valent metal-oxo species that have been regarded as key intermediates in diverse oxidative reactions in biological system. However, recent studies have shown that metal-iodosylbenzene adduct, known as a precursor of metal-oxo species, plays an important role in transition metal-catalyzed oxidation reactions. During last few decades, extensive investigations have been conducted on the synthesis and reactivity studies of metal-iodosylbenzene adducts with early and middle transition metals including manganese, iron, cobalt. Nevertheless, metal-iodosylbenzene adducts with late transition metals such as nickel, copper and zinc, still remains elusive. Herein, we report a novel copper(II)-iodosylbenzene adduct bearing a linear ligand composed of two pyridine rings and an ethoxyethanol side-chain, [Cu(OIPh)(HN3O2)]2+ (1). The copper(II)-iodosylbenzene adduct was characterized by several spectroscopic methods including UV-vis spectroscopy, electrospray ionization mass spectrometer (ESI MS), and electron paramagnetic resonance (EPR) combined with theoretical calculations. Interestingly, 1 can carry out the catalytic sulfoxidation reaction. In sulfoxidation reaction with thioanisole under catalytic reaction condition, not only two-electron but also four-electron oxidized products such sulfoxide and sulfone were yielded, respectively. However, 1 was not an efficient oxidant towards CH bond activation and epoxidation reactions due to the steric hindrance created by the intramolecular H-bonding interaction between HN3O2 ligand and iodosylbenzene moiety.
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Affiliation(s)
- Hyeri Jeon
- Department of Chemistry, Sookmyung Women's University, 04310, Seoul, 03722, Republic of Korea
| | - Hana Oh
- Department of Chemistry, Sookmyung Women's University, 04310, Seoul, 03722, Republic of Korea
| | - Seungwoo Hong
- Department of Chemistry, Sookmyung Women's University, 04310, Seoul, 03722, Republic of Korea.
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5
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Investigating reactivity and electronic structure of copper(II)-polypyridyl complexes and hydrogen peroxide. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Abstract
Lytic polysaccharide monooxygenases (LPMOs) are a recently discovered class of monocopper enzymes broadly distributed across the tree of life. Recent reports indicate that LPMOs can use H2O2 as an oxidant and thus carry out a novel type of peroxygenase reaction involving unprecedented copper chemistry. Here, we present a combined computational and experimental analysis of the H2O2-mediated reaction mechanism. In silico studies, based on a model of the enzyme in complex with a crystalline substrate, suggest that a network of hydrogen bonds, involving both the enzyme and the substrate, brings H2O2 into a strained reactive conformation and guides a derived hydroxyl radical toward formation of a copper-oxyl intermediate. The initial cleavage of H2O2 and subsequent hydrogen atom abstraction from chitin by the copper-oxyl intermediate are the main energy barriers. Stopped-flow fluorimetry experiments demonstrated that the priming reduction of LPMO-Cu(II) to LPMO-Cu(I) is a fast process compared to the reoxidation reactions. Using conditions resulting in single oxidative events, we found that reoxidation of LPMO-Cu(I) is 2,000-fold faster with H2O2 than with O2, the latter being several orders of magnitude slower than rates reported for other monooxygenases. The presence of substrate accelerated reoxidation by H2O2, whereas reoxidation by O2 became slower, supporting the peroxygenase paradigm. These insights into the peroxygenase nature of LPMOs will aid in the development and application of enzymatic and synthetic copper catalysts and contribute to a further understanding of the roles of LPMOs in nature, varying from biomass conversion to chitinolytic pathogenesis-defense mechanisms.
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7
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Diaz DE, Bhadra M, Karlin KD. Dimethylanilinic N-Oxides and Their Oxygen Surrogacy Role in the Formation of a Putative High-Valent Copper-Oxygen Species. Inorg Chem 2019; 58:13746-13750. [PMID: 31580063 PMCID: PMC6896993 DOI: 10.1021/acs.inorgchem.9b02066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of p-cyano-N,N-dimethylaniline N-oxide, an O-atom donor, with different copper(I) complexes (at room temperature and in acetone) indicates the formation via O-atom transfer of a high-valent copper oxyl species, CuII-O•, a putative key intermediate in the catalytic cycle of copper-containing monooxygenases. The formation of p-cyano-N-hydroxymethyl-N-methylaniline and p-cyano-N-methylaniline as the main products of the reaction highlight the capability of this species to hydroxylate strong C-H bonds (bond dissociation energy ∼ 90 kcal/mol). A plausible mechanism for the reactivity of this catalytic system is proposed.
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Affiliation(s)
- Daniel E. Diaz
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mayukh Bhadra
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kenneth D. Karlin
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
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8
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Abstract
Metal-oxyl (Mn+-O•) complexes having an oxyl radical ligand, which are electronically equivalent to well-known metal-oxo (M(n+1)+═O) complexes, are surveyed as a new category of metal-based oxidants. Detection and characterization of Mn+-O• species have been made in some cases, although proposals and characterization of the species are mostly done on the basis of density functional theory (DFT) calculations. The reactivity of Mn+-O• complexes will provide a way to achieve potentially difficult oxidative conversion of substrates. This Viewpoint will provide state-of-the-art knowledge on the Mn+-O• species in terms of the formation, characterization, and DFT-based proposals to shed light on the characteristics of the intriguing oxidatively active species.
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Affiliation(s)
- Yoshihiro Shimoyama
- Department of Chemistry, Faculty of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 305-8571 , Japan.,Interdisciplinary Research Center for Catalytic Chemistry , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba , Ibaraki 305-8565 , Japan
| | - Takahiko Kojima
- Department of Chemistry, Faculty of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 305-8571 , Japan
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9
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Jiang YY, Li G, Yang D, Zhang Z, Zhu L, Fan X, Bi S. Mechanism of Cu-Catalyzed Aerobic C(CO)–CH3 Bond Cleavage: A Combined Computational and Experimental Study. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03993] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yuan-Ye Jiang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
| | - Guoqing Li
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
| | - Daoshan Yang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
| | - Zhaoshun Zhang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
| | - Ling Zhu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
| | - Xia Fan
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
| | - Siwei Bi
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
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10
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Abstract
Bis(guanidine) copper complexes are known for their ability to activate dioxygen. Unfortunately, until now, no bis(guanidine) copper-dioxygen adduct has been able to transfer oxygen to substrates. Using an aromatic backbone, fluorescence properties can be added to the copper(I) complex which renders them useful for later reaction monitoring. The novel bis(guanidine) ligand DMEG2tol stabilizes copper(I) and copper(II) complexes (characterized by single crystal X-ray diffraction, IR spectroscopy, and mass spectrometry) and, after oxygen activation, bis(µ-oxido) dicopper(III) complexes which have been characterized by low-temperature UV/Vis and Raman spectroscopy. These bis(guanidine) stabilized bis(µ-oxido) complexes are able to mediate tyrosinase-like hydroxylation activity as first examples of bis(guanidine) stabilized complexes. The experimental study is accompanied by density functional theory calculations which highlight the special role of the different guanidine donors.
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11
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Abstract
The isolation of terminal oxo complexes of the late transition metals promises new avenues in oxidation catalysis like the selective and catalytic hydroxylation of unreactive CH bonds, the activation of water, or the upgrading of olefins. While terminal oxo ligands are ubiquitous for early transition metals, well-characterized examples with group 10 metals remain hitherto elusive. In search for palladium terminal oxo complexes, the relative stability/reactivity of such compounds are evaluated computationally (CASSCF/NEVPT2; DFT). The calculations investigate only well-known ligand systems with established synthetic procedures and relevance for coordination chemistry and homogeneous catalysis. They delineate and quantify, which electronic properties of ancillary ligands are crucial for taming otherwise highly reactive terminal oxo intermediates. Notably, carbene ligands with both strong σ-donor and strong π-acceptor properties are best suited for the stabilization of palladium(ii) terminal oxo complexes, whereas ligands with a weaker ligand field lead to highly reactive complexes. Strongly donating ligands are an excellent choice for high-valent palladium(iv) terminal oxo compounds. Low coordinate palladium(ii) as well as high-valent palladium(iv) complexes are best suited for the activation of strong bonds.
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Affiliation(s)
- Dominik Munz
- Friedrich-Alexander Universität Erlangen-Nürnberg , Egerlandstr. 1 , 91058 Erlangen , Germany .
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12
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Bie L, Liu F, Li Y, Dong T, Gao J, Du L, Yuan Q. Spin crossover dynamics studies on the thermally activated molecular oxygen binding mechanism on a model copper complex. Phys Chem Chem Phys 2018; 20:15852-15862. [DOI: 10.1039/c8cp02482k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The theoretical description of the primary dioxygen (O2) binding and activation step in many copper or iron enzymes, suffers from the instrinsically electronic non-adiabaticity of the spin flip events of the triplet dioxygen molecule (3O2), mediated by spin–orbit couplings.
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Affiliation(s)
- Lihua Bie
- Hubei Key Laboratory of Agricultural Bioinformatics
- College of Informatics
- Huazhong Agricultural University
- Wuhan
- P. R. China
| | - Fang Liu
- Hubei Key Laboratory of Agricultural Bioinformatics
- College of Informatics
- Huazhong Agricultural University
- Wuhan
- P. R. China
| | - Yanwei Li
- Environment Research Institute
- Shandong University
- Jinan
- P. R. China
| | - Tiange Dong
- Hubei Key Laboratory of Agricultural Bioinformatics
- College of Informatics
- Huazhong Agricultural University
- Wuhan
- P. R. China
| | - Jun Gao
- Hubei Key Laboratory of Agricultural Bioinformatics
- College of Informatics
- Huazhong Agricultural University
- Wuhan
- P. R. China
| | - Likai Du
- Hubei Key Laboratory of Agricultural Bioinformatics
- College of Informatics
- Huazhong Agricultural University
- Wuhan
- P. R. China
| | - Qiaoxia Yuan
- College of Engineering
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
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13
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Vilella L, Conde A, Balcells D, Díaz-Requejo MM, Lledós A, Pérez PJ. A competing, dual mechanism for catalytic direct benzene hydroxylation from combined experimental-DFT studies. Chem Sci 2017; 8:8373-8383. [PMID: 29619184 PMCID: PMC5863614 DOI: 10.1039/c7sc02898a] [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] [Received: 06/30/2017] [Accepted: 10/04/2017] [Indexed: 11/21/2022] Open
Abstract
A dual mechanism for direct benzene catalytic hydroxylation is described. Experimental studies and DFT calculations have provided a mechanistic explanation for the acid-free, Tp x Cu-catalyzed hydroxylation of benzene with hydrogen peroxide (Tp x = hydrotrispyrazolylborate ligand). In contrast with other catalytic systems that promote this transformation through Fenton-like pathways, this system operates through a copper-oxyl intermediate that may interact with the arene ring following two different, competitive routes: (a) electrophilic aromatic substitution, with the copper-oxyl species acting as the formal electrophile, and (b) the so-called rebound mechanism, in which the hydrogen is abstracted by the Cu-O moiety prior to the C-O bond formation. Both pathways contribute to the global transformation albeit to different extents, the electrophilic substitution route seeming to be largely favoured.
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Affiliation(s)
- Laia Vilella
- Departament de Química , Universitat Autònoma de Barcelona , 08193 Bellaterra , Spain .
| | - Ana Conde
- Laboratorio de Catálisis Homogénea , Unidad Asociada al CSIC , CIQSO-Centro de Investigación en Química Sostenible , Departamento de Química , Universidad de Huelva , 21007 Huelva , Spain . ;
| | - David Balcells
- Hylleraas Quantum Molecular Sciences , Department of Chemistry , University of Oslo , P.O. Box 1033 Blindern , N-0315 Oslo , Norway .
| | - M Mar Díaz-Requejo
- Laboratorio de Catálisis Homogénea , Unidad Asociada al CSIC , CIQSO-Centro de Investigación en Química Sostenible , Departamento de Química , Universidad de Huelva , 21007 Huelva , Spain . ;
| | - Agustí Lledós
- Departament de Química , Universitat Autònoma de Barcelona , 08193 Bellaterra , Spain .
| | - Pedro J Pérez
- Laboratorio de Catálisis Homogénea , Unidad Asociada al CSIC , CIQSO-Centro de Investigación en Química Sostenible , Departamento de Química , Universidad de Huelva , 21007 Huelva , Spain . ;
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14
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Elwell CE, Gagnon NL, Neisen BD, Dhar D, Spaeth AD, Yee GM, Tolman WB. Copper-Oxygen Complexes Revisited: Structures, Spectroscopy, and Reactivity. Chem Rev 2017; 117:2059-2107. [PMID: 28103018 PMCID: PMC5963733 DOI: 10.1021/acs.chemrev.6b00636] [Citation(s) in RCA: 445] [Impact Index Per Article: 63.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A longstanding research goal has been to understand the nature and role of copper-oxygen intermediates within copper-containing enzymes and abiological catalysts. Synthetic chemistry has played a pivotal role in highlighting the viability of proposed intermediates and expanding the library of known copper-oxygen cores. In addition to the number of new complexes that have been synthesized since the previous reviews on this topic in this journal (Mirica, L. M.; Ottenwaelder, X.; Stack, T. D. P. Chem. Rev. 2004, 104, 1013-1046 and Lewis, E. A.; Tolman, W. B. Chem. Rev. 2004, 104, 1047-1076), the field has seen significant expansion in the (1) range of cores synthesized and characterized, (2) amount of mechanistic work performed, particularly in the area of organic substrate oxidation, and (3) use of computational methods for both the corroboration and prediction of proposed intermediates. The scope of this review has been limited to well-characterized examples of copper-oxygen species but seeks to provide a thorough picture of the spectroscopic characteristics and reactivity trends of the copper-oxygen cores discussed.
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Affiliation(s)
- Courtney E Elwell
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Nicole L Gagnon
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Benjamin D Neisen
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Debanjan Dhar
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Andrew D Spaeth
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Gereon M Yee
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - William B Tolman
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
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15
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Ma D, Li Manni G, Olsen J, Gagliardi L. Second-Order Perturbation Theory for Generalized Active Space Self-Consistent-Field Wave Functions. J Chem Theory Comput 2016; 12:3208-13. [DOI: 10.1021/acs.jctc.6b00382] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dongxia Ma
- Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Giovanni Li Manni
- Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Jeppe Olsen
- Department
of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus, Denmark
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16
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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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17
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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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18
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Yumura T, Hirose Y, Wakasugi T, Kuroda Y, Kobayashi H. Roles of Water Molecules in Modulating the Reactivity of Dioxygen-Bound Cu-ZSM-5 toward Methane: A Theoretical Prediction. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02477] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Yumura
- Department
of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki,
Sakyo-ku, Kyoto 606-8585, Japan
| | - Yuuki Hirose
- Department
of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki,
Sakyo-ku, Kyoto 606-8585, Japan
| | - Takashi Wakasugi
- Department
of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki,
Sakyo-ku, Kyoto 606-8585, Japan
| | - Yasushige Kuroda
- Department
of Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima,
Kita-ku, Okayama 700-8530, Japan
| | - Hisayoshi Kobayashi
- Department
of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki,
Sakyo-ku, Kyoto 606-8585, Japan
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19
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Gagnon N, Tolman WB. [CuO](+) and [CuOH](2+) complexes: intermediates in oxidation catalysis? Acc Chem Res 2015; 48:2126-31. [PMID: 26075312 DOI: 10.1021/acs.accounts.5b00169] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Characterization of monocopper intermediates in enzymes and other catalysts that attack strong C-H bonds is important for unraveling oxidation catalysis mechanisms and, ultimately, designing new, more efficient catalytic systems. Because initially formed 1:1 Cu/O2 adducts resulting from reactions of Cu(I) sites with O2 react relatively sluggishly with substrates with strong C-H bonds, it has been suggested that reductive O-O bond scission might occur instead to yield more reactive [CuO](+) or protonated [CuOH](2+) cores. Experimental and theoretical studies of [CuO](+) species in the gas phase have provided key insights into the possible reactivity of these species, but detailed information is lacking for discrete complexes with the [CuO](+) or [CuOH](2+) core in solution or the solid state. We describe herein our recent efforts to address this issue through several disparate approaches. In one strategy based on precedent from studies of enzymes and synthetic compounds with iron-α-ketocarboxylate motifs, reactions of O2 with Cu(I)-α-ketocarboxylate complexes were explored, with the aim of identifying reaction pathways that would implicate the intermediacy of a [CuO](+) species. A second approach focused on the reaction of N-oxides with Cu(I) complexes, with the goal being to elicit O-N bond heterolysis to yield [CuO](+) complexes. For both strategies, the course of the reactions depended on the nature of the supporting bidentate N-donor ligand, and indirect evidence in support of the sought-after [CuO](+) intermediates was obtained in some instances. In the final approach discussed herein, strongly electron donating and sterically encumbered pyridine-dicarboxamide ligands (L) enabled the synthesis of [LCu(II)OH](-) complexes, which upon one-electron oxidation formed complexes with the [CuOH](2+) core that were characterized in solution. Rapid hydrogen atom abstraction (HAT) from dihydroanthracene (DHA) was observed, yielding LCu(II)OH2. The O-H bond dissociation enthalpy (BDE) of ∼90 kcal/mol for this complex was determined through evaluation of its pKa (∼19) and the [LCu(II)OH](-)/LCu(III)OH reduction potential (approximately -0.08 V vs Fc/Fc(+)). Thus, the poor oxidizing power of the complex is offset by the high basicity of the hydroxide moiety to yield a strong O-H bond. This high BDE provided a thermodynamic rationale for the rapid HAT rate from DHA and suggested that stronger C-H bonds could be attacked. Indeed, using an inert solvent (1,2-difluorobenzene), substrates with C-H bond strengths as high as 99 kcal/mol were shown to react with the [CuOH](2+) complex, and a linear log k vs C-H BDE plot supported similar HAT pathways across the series. Importantly, these results provided key evidence in favor of the possible intermediacy of this core in oxidation catalysis, and we suggest that because it is a more energetically accessible intermediate than the [CuO](+) moiety, it should be considered as an alternative in proposed mechanisms for oxidations by enzymes and other synthetic systems.
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Affiliation(s)
- Nicole Gagnon
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - William B. Tolman
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
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20
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Kim S, Ginsbach JW, Lee JY, Peterson RL, Liu JJ, Siegler MA, Sarjeant AA, Solomon EI, Karlin KD. Amine oxidative N-dealkylation via cupric hydroperoxide Cu-OOH homolytic cleavage followed by site-specific fenton chemistry. J Am Chem Soc 2015; 137:2867-74. [PMID: 25706825 PMCID: PMC4482616 DOI: 10.1021/ja508371q] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Copper(II) hydroperoxide species are significant intermediates in processes such as fuel cells and (bio)chemical oxidations, all involving stepwise reduction of molecular oxygen. We previously reported a Cu(II)-OOH species that performs oxidative N-dealkylation on a dibenzylamino group that is appended to the 6-position of a pyridyl donor of a tripodal tetradentate ligand. To obtain insights into the mechanism of this process, reaction kinetics and products were determined employing ligand substrates with various para-substituent dibenzyl pairs (-H,-H; -H,-Cl; -H,-OMe, and -Cl,-OMe), or with partially or fully deuterated dibenzyl N-(CH2Ph)2 moieties. A series of ligand-copper(II) bis-perchlorate complexes were synthesized, characterized, and the X-ray structures of the -H,-OMe analogue were determined. The corresponding metastable Cu(II)-OOH species were generated by addition of H2O2/base in acetone at -90 °C. These convert (t1/2 ≈ 53 s) to oxidatively N-dealkylated products, producing para-substituted benzaldehydes. Based on the experimental observations and supporting DFT calculations, a reaction mechanism involving dibenzylamine H-atom abstraction or electron-transfer oxidation by the Cu(II)-OOH entity could be ruled out. It is concluded that the chemistry proceeds by rate limiting Cu-O homolytic cleavage of the Cu(II)-(OOH) species, followed by site-specific copper Fenton chemistry. As a process of broad interest in copper as well as iron oxidative (bio)chemistries, a detailed computational analysis was performed, indicating that a Cu(I)OOH species undergoes O-O homolytic cleavage to yield a hydroxyl radical and Cu(II)OH rather than heterolytic cleavage to yield water and a Cu(II)-O(•-) species.
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Affiliation(s)
- Sunghee Kim
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Jake W. Ginsbach
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Jung Yoon Lee
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Ryan L. Peterson
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Jeffrey J. Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Maxime A. Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Amy A. Sarjeant
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
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21
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Su XJ, Gao M, Jiao L, Liao RZ, Siegbahn PEM, Cheng JP, Zhang MT. Electrocatalytic Water Oxidation by a Dinuclear Copper Complex in a Neutral Aqueous Solution. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411625] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Su XJ, Gao M, Jiao L, Liao RZ, Siegbahn PEM, Cheng JP, Zhang MT. Electrocatalytic Water Oxidation by a Dinuclear Copper Complex in a Neutral Aqueous Solution. Angew Chem Int Ed Engl 2015; 54:4909-14. [DOI: 10.1002/anie.201411625] [Citation(s) in RCA: 187] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 11/11/2022]
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23
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Payne CM, Knott BC, Mayes HB, Hansson H, Himmel ME, Sandgren M, Ståhlberg J, Beckham GT. Fungal Cellulases. Chem Rev 2015; 115:1308-448. [DOI: 10.1021/cr500351c] [Citation(s) in RCA: 533] [Impact Index Per Article: 59.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Christina M. Payne
- Department
of Chemical and Materials Engineering and Center for Computational
Sciences, University of Kentucky, 177 F. Paul Anderson Tower, Lexington, Kentucky 40506, United States
| | - Brandon C. Knott
- National
Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver
West Parkway, Golden, Colorado 80401, United States
| | - Heather B. Mayes
- Department
of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Henrik Hansson
- Department
of Chemistry and Biotechnology, Swedish University of Agricultural Sciences, Uppsala BioCenter, Almas allé 5, SE-75651 Uppsala, Sweden
| | - Michael E. Himmel
- Biosciences
Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States
| | - Mats Sandgren
- Department
of Chemistry and Biotechnology, Swedish University of Agricultural Sciences, Uppsala BioCenter, Almas allé 5, SE-75651 Uppsala, Sweden
| | - Jerry Ståhlberg
- Department
of Chemistry and Biotechnology, Swedish University of Agricultural Sciences, Uppsala BioCenter, Almas allé 5, SE-75651 Uppsala, Sweden
| | - Gregg T. Beckham
- National
Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver
West Parkway, Golden, Colorado 80401, United States
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24
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Dhar D, Tolman WB. Hydrogen atom abstraction from hydrocarbons by a copper(III)-hydroxide complex. J Am Chem Soc 2015; 137:1322-9. [PMID: 25581555 PMCID: PMC4311965 DOI: 10.1021/ja512014z] [Citation(s) in RCA: 135] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Indexed: 12/17/2022]
Abstract
With the aim of understanding the basis for the high rate of hydrogen atom abstraction (HAT) from dihydroanthracene (DHA) by the complex LCuOH (1; L = N,N'-bis(2,6-diisopropylphenyl)-2,6-pyridinedicarboxamide), the bond dissociation enthalpy of the reaction product LCu(H2O) (2) was determined through measurement of its pK(a) and E(1/2) in THF solution. In so doing, an equilibrium between 2 and LCu(THF) was characterized by UV-vis and EPR spectroscopy and cyclic voltammetry (CV). A high pK(a) of 18.8 ± 1.8 and a low E(1/2) of -0.074 V vs Fc/Fc(+) in THF combined to yield an O-H BDE for 2 of 90 ± 3 kcal mol(-1) that is large relative to values for most transition metal oxo/hydroxo complexes. By taking advantage of the increased stability of 1 observed in 1,2-difluorobenzene (DFB) solvent, the kinetics of the reactions of 1 with a range of substrates with varying BDE values for their C-H bonds were measured. The oxidizing power of 1 was revealed through the accelerated decay of 1 in the presence of the substrates, including THF (BDE = 92 kcal mol(-1)) and cyclohexane (BDE = 99 kcal mol(-1)). CV experiments in THF solvent showed that 1 reacted with THF via rate-determining attack at the THF C-H(D) bonds with a kinetic isotope effect of 10.2. Analysis of the kinetic and thermodynamic data provides new insights into the basis for the high reactivity of 1 and the possible involvement of species like 1 in oxidation catalysis.
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Affiliation(s)
- Debanjan Dhar
- Department of Chemistry and
Center for Metals in Biocatalysis, University
of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
| | - William B. Tolman
- Department of Chemistry and
Center for Metals in Biocatalysis, University
of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
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25
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Abstract
In order to address how diverse metalloprotein active sites, in particular those containing iron and copper, guide O₂binding and activation processes to perform diverse functions, studies of synthetic models of the active sites have been performed. These studies have led to deep, fundamental chemical insights into how O₂coordinates to mono- and multinuclear Fe and Cu centers and is reduced to superoxo, peroxo, hydroperoxo, and, after O-O bond scission, oxo species relevant to proposed intermediates in catalysis. Recent advances in understanding the various factors that influence the course of O₂activation by Fe and Cu complexes are surveyed, with an emphasis on evaluating the structure, bonding, and reactivity of intermediates involved. The discussion is guided by an overarching mechanistic paradigm, with differences in detail due to the involvement of disparate metal ions, nuclearities, geometries, and supporting ligands providing a rich tapestry of reaction pathways by which O₂is activated at Fe and Cu sites.
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26
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Li M, Xie Y, Ye Y, Zou Y, Jiang H, Zeng W. Cu(I)-Catalyzed Transannulation of N-Heteroaryl Aldehydes or Ketones with Alkylamines via C(sp3)–H Amination. Org Lett 2014; 16:6232-5. [DOI: 10.1021/ol503165b] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Mingyang Li
- School
of Chemistry and Chemical Engineering, South China University of Technolgy, Guangzhou 510641, China
| | - Ying Xie
- School
of Chemistry and Chemical Engineering, South China University of Technolgy, Guangzhou 510641, China
| | - Yong Ye
- School
of Chemistry and Chemical Engineering, South China University of Technolgy, Guangzhou 510641, China
| | - Yong Zou
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Huanfeng Jiang
- School
of Chemistry and Chemical Engineering, South China University of Technolgy, Guangzhou 510641, China
| | - Wei Zeng
- School
of Chemistry and Chemical Engineering, South China University of Technolgy, Guangzhou 510641, China
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27
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Takisawa H, Morishima Y, Soma S, Szilagyi RK, Fujisawa K. Conversion of carbon dioxide to oxalate by α-ketocarboxylatocopper(II) complexes. Inorg Chem 2014; 53:8191-3. [PMID: 25102222 DOI: 10.1021/ic5006242] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The α-ketocarboxylatocopper(II) complex [{Cu(L1)}{O2CC(O)CH(CH3)2}] can be spontaneously converted into the binuclear oxalatocopper(II) complex [{Cu(L1)}2(μ-C2O4)] upon exposure to O2/CO2 gas. (13)C-labeling experiments revealed that oxalate ions partially incorporated (13)CO2 molecules. Furthermore, the bicarbonatocopper(I) complex (NEt4)[Cu(L1){O2C(OH)}] in an Ar atmosphere and the α-ketocarboxylatocopper(I) complex Na[Cu(L1){O2CC(O)CH(CH3)2}] in an O2 atmosphere were also transformed spontaneously into the oxalato complex [{Cu(L1)}2(μ-C2O4)].
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Affiliation(s)
- Hideyuki Takisawa
- Department of Chemistry, Ibaraki University , Mito, 310-8512 Ibaraki, Japan
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28
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Farahani P, Roca-Sanjuán D, Aquilante F. A two-scale approach to electron correlation in multiconfigurational perturbation theory. J Comput Chem 2014; 35:1609-17. [DOI: 10.1002/jcc.23666] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 06/03/2014] [Accepted: 06/06/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Pooria Farahani
- Department of Chemistry - Ångström, The Theoretical Chemistry Programme; Uppsala University; P. O. Box 518 SE-751 20 Uppsala Sweden
| | - Daniel Roca-Sanjuán
- Instituto de Ciencia Molecular; Universitat de València; P.O. Box 22085 ES-46071 València Spain
| | - Francesco Aquilante
- Department of Chemistry - Ångström, The Theoretical Chemistry Programme; Uppsala University; P. O. Box 518 SE-751 20 Uppsala Sweden
- Dipartimento di Chimica “G. Ciamician”; Università di Bologna; V. F. Selmi 2 40126 Bologna Italy
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29
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Structural and functional characterization of a conserved pair of bacterial cellulose-oxidizing lytic polysaccharide monooxygenases. Proc Natl Acad Sci U S A 2014; 111:8446-51. [PMID: 24912171 DOI: 10.1073/pnas.1402771111] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
For decades, the enzymatic conversion of cellulose was thought to rely on the synergistic action of hydrolytic enzymes, but recent work has shown that lytic polysaccharide monooxygenases (LPMOs) are important contributors to this process. We describe the structural and functional characterization of two functionally coupled cellulose-active LPMOs belonging to auxiliary activity family 10 (AA10) that commonly occur in cellulolytic bacteria. One of these LPMOs cleaves glycosidic bonds by oxidation of the C1 carbon, whereas the other can oxidize both C1 and C4. We thus demonstrate that C4 oxidation is not confined to fungal AA9-type LPMOs. X-ray crystallographic structures were obtained for the enzyme pair from Streptomyces coelicolor, solved at 1.3 Å (ScLPMO10B) and 1.5 Å (CelS2 or ScLPMO10C) resolution. Structural comparisons revealed differences in active site architecture that could relate to the ability to oxidize C4 (and that also seem to apply to AA9-type LPMOs). Despite variation in active site architecture, the two enzymes exhibited similar affinities for Cu(2+) (12-31 nM), redox potentials (242 and 251 mV), and electron paramagnetic resonance spectra, with only the latter clearly different from those of chitin-active AA10-type LPMOs. We conclude that substrate specificity depends not on copper site architecture, but rather on variation in substrate binding and orientation. During cellulose degradation, the members of this LPMO pair act in synergy, indicating different functional roles and providing a rationale for the abundance of these enzymes in biomass-degrading organisms.
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30
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Saracini C, Liakos DG, Zapata Rivera JE, Neese F, Meyer GJ, Karlin KD. Excitation wavelength dependent O2 release from copper(II)-superoxide compounds: laser flash-photolysis experiments and theoretical studies. J Am Chem Soc 2014; 136:1260-3. [PMID: 24428309 DOI: 10.1021/ja4115314] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Irradiation of the copper(II)-superoxide synthetic complexes [(TMG3tren)Cu(II)(O2)](+) (1) and [(PV-TMPA)Cu(II)(O2)](+) (2) with visible light resulted in direct photogeneration of O2 gas at low temperature (from -40 °C to -70 °C for 1 and from -125 to -135 °C for 2) in 2-methyltetrahydrofuran (MeTHF) solvent. The yield of O2 release was wavelength dependent: λexc = 436 nm, ϕ = 0.29 (for 1), ϕ = 0.11 (for 2), and λexc = 683 nm, ϕ = 0.035 (for 1), ϕ = 0.078 (for 2), which was followed by fast O2-recombination with [(TMG3tren)Cu(I)](+) (3) and [(PV-TMPA)Cu(I)](+) (4). Enthalpic barriers for O2 rebinding to the copper(I) center (∼10 kJ mol(-1)) and for O2 dissociation from the superoxide compound 1 (45 kJ mol(-1)) were determined. TD-DFT studies, carried out for 1, support the experimental results confirming the dissociative character of the excited states formed upon blue- or red-light laser excitation.
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Affiliation(s)
- Claudio Saracini
- Department of Chemistry, The Johns Hopkins University , Baltimore, Maryland 21218, United States
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31
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Tsipis AC. DFT/TDDFT insights into the chemistry, biochemistry and photophysics of copper coordination compounds. RSC Adv 2014. [DOI: 10.1039/c4ra04921g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Highlighting the recent progress in DFT/TDDFT application to coordination chemistry of copper.
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Affiliation(s)
- Athanassios C. Tsipis
- Laboratory of Inorganic and General Chemistry
- Department of Chemistry
- University of Ioannina
- 451 10 Ioannina
- Greece
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32
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Quantum mechanical calculations suggest that lytic polysaccharide monooxygenases use a copper-oxyl, oxygen-rebound mechanism. Proc Natl Acad Sci U S A 2013; 111:149-54. [PMID: 24344312 DOI: 10.1073/pnas.1316609111] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Lytic polysaccharide monooxygenases (LPMOs) exhibit a mononuclear copper-containing active site and use dioxygen and a reducing agent to oxidatively cleave glycosidic linkages in polysaccharides. LPMOs represent a unique paradigm in carbohydrate turnover and exhibit synergy with hydrolytic enzymes in biomass depolymerization. To date, several features of copper binding to LPMOs have been elucidated, but the identity of the reactive oxygen species and the key steps in the oxidative mechanism have not been elucidated. Here, density functional theory calculations are used with an enzyme active site model to identify the reactive oxygen species and compare two hypothesized reaction pathways in LPMOs for hydrogen abstraction and polysaccharide hydroxylation; namely, a mechanism that employs a η(1)-superoxo intermediate, which abstracts a substrate hydrogen and a hydroperoxo species is responsible for substrate hydroxylation, and a mechanism wherein a copper-oxyl radical abstracts a hydrogen and subsequently hydroxylates the substrate via an oxygen-rebound mechanism. The results predict that oxygen binds end-on (η(1)) to copper, and that a copper-oxyl-mediated, oxygen-rebound mechanism is energetically preferred. The N-terminal histidine methylation is also examined, which is thought to modify the structure and reactivity of the enzyme. Density functional theory calculations suggest that this posttranslational modification has only a minor effect on the LPMO active site structure or reactivity for the examined steps. Overall, this study suggests the steps in the LPMO mechanism for oxidative cleavage of glycosidic bonds.
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33
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Zhang L, Wang X, Li S, Wu J. Synthesis of pyrrole-2,3,4,5-tetracarboxylates via a copper-catalyzed reaction of amine with but-2-ynedioate. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Conde A, Vilella L, Balcells D, Díaz-Requejo MM, Lledós A, Pérez PJ. Introducing Copper as Catalyst for Oxidative Alkane Dehydrogenation. J Am Chem Soc 2013; 135:3887-96. [DOI: 10.1021/ja310866k] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Ana Conde
- Laboratorio de Catálisis
Homogénea, Departamento de Química y Ciencia de los
Materiales, Unidad Asociada al CSIC, CIQSO-Centro de Investigación
en Química Sostenible, Universidad de Huelva, Campus de El Carmen 21007 Huelva, Spain
| | - Laia Vilella
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra,
Spain
| | - David Balcells
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra,
Spain
- Centre for Theoretical
and Computational
Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern N-0315, Oslo, Norway
| | - M. Mar Díaz-Requejo
- Laboratorio de Catálisis
Homogénea, Departamento de Química y Ciencia de los
Materiales, Unidad Asociada al CSIC, CIQSO-Centro de Investigación
en Química Sostenible, Universidad de Huelva, Campus de El Carmen 21007 Huelva, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra,
Spain
| | - Pedro J. Pérez
- Laboratorio de Catálisis
Homogénea, Departamento de Química y Ciencia de los
Materiales, Unidad Asociada al CSIC, CIQSO-Centro de Investigación
en Química Sostenible, Universidad de Huelva, Campus de El Carmen 21007 Huelva, Spain
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35
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Ertem MZ, Gagliardi L, Cramer CJ. Quantum chemical characterization of the mechanism of an iron-based water oxidation catalyst. Chem Sci 2012. [DOI: 10.1039/c2sc01030e] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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36
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Ma D, Li Manni G, Gagliardi L. The generalized active space concept in multiconfigurational self-consistent field methods. J Chem Phys 2011; 135:044128. [PMID: 21806111 DOI: 10.1063/1.3611401] [Citation(s) in RCA: 195] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A multiconfigurational self-consistent field method based on the concept of generalized active space (GAS) is presented. GAS wave functions are obtained by defining an arbitrary number of active spaces with arbitrary occupation constraints. By a suitable choice of the GAS spaces, numerous ineffective configurations present in a large complete active space (CAS) can be removed, while keeping the important ones in the CI space. As a consequence, the GAS self-consistent field approach retains the accuracy of the CAS self-consistent field (CASSCF) ansatz and, at the same time, can deal with larger active spaces, which would be unaffordable at the CASSCF level. Test calculations on the Gd atom, Gd(2) molecule, and oxoMn(salen) complex are presented. They show that GAS wave functions achieve the same accuracy as CAS wave functions on systems that would be prohibitive at the CAS level.
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Affiliation(s)
- Dongxia Ma
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
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37
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Donoghue PJ, Tehranchi J, Cramer CJ, Sarangi R, Solomon EI, Tolman WB. Rapid C-H bond activation by a monocopper(III)-hydroxide complex. J Am Chem Soc 2011; 133:17602-5. [PMID: 22004091 DOI: 10.1021/ja207882h] [Citation(s) in RCA: 162] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
One-electron oxidation of the tetragonal Cu(II) complex [Bu(4)N][LCuOH] at -80 °C generated the reactive intermediate LCuOH, which was shown to be a Cu(III) complex on the basis of spectroscopy and theory (L = N,N'-bis(2,6-diisopropylphenyl)-2,6-pyridinedicarboxamide). The complex LCuOH reacts with dihydroanthracene to yield anthracene and the Cu(II) complex LCu(OH(2)). Kinetic studies showed that the reaction occurs via H-atom abstraction via a second-order rate law at high rates (cf. k = 1.1(1) M(-1) s(-1) at -80 °C, ΔH(‡) = 5.4(2) kcal mol(-1), ΔS(‡) = -30(2) eu) and with very large kinetic isotope effects (cf. k(H)/k(D) = 44 at -70 °C). The findings suggest that a Cu(III)-OH moiety is a viable reactant in oxidation catalysis.
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Affiliation(s)
- Patrick J Donoghue
- Department of Chemistry, Center for Metals in Biocatalysis, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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38
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González L, Escudero D, Serrano-Andrés L. Progress and Challenges in the Calculation of Electronic Excited States. Chemphyschem 2011; 13:28-51. [DOI: 10.1002/cphc.201100200] [Citation(s) in RCA: 310] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 08/05/2011] [Indexed: 11/09/2022]
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39
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Benzylic Ligand Hydroxylation Starting from a Dicopper μ-η2:η2 Peroxo Intermediate: Dramatic Acceleration of the Reaction by Hydrogen-Atom Donors. Angew Chem Int Ed Engl 2011; 50:6924-7. [DOI: 10.1002/anie.201102332] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Indexed: 11/07/2022]
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40
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Rolff M, Hamann JN, Tuczek F. Benzylische Ligand-Hydroxylierung über ein Dikupfer-μ-η2:η2-Peroxo-Intermediat: drastische Reaktionsbeschleunigung durch Wasserstoffatom-Donoren. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102332] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Ruipérez F, Aquilante F, Ugalde JM, Infante I. Complete vs Restricted Active Space Perturbation Theory Calculation of the Cr2 Potential Energy Surface. J Chem Theory Comput 2011; 7:1640-6. [PMID: 26596430 DOI: 10.1021/ct200048z] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In this paper, we calculate the potential energy surface (PES) and the spectroscopic constants of the chromium dimer using the recently developed restricted active space second-order perturbation (RASPT2) method. This approach is benchmarked against available experimental measurements and the complete active space second-order perturbation theory (CASPT2), which is nowadays established as one of the most accurate theoretical models available. Dissociation energies, vibrational frequencies, and bond distances are computed at the RASPT2 level using several reference spaces. The major advantage of the RASPT2 method is that with a limited number of configuration state functions, it can reproduce well the equilibrium bond length and the vibrational frequency of the Cr dimer. On the other hand, the PES is well described only at short distances, while at large distances, it compares very poorly with the CASPT2. The dissociation energy is also ill-behaved, but its value can be largely improved using a simple workaround that we explain in the text. In the paper, we also address the effect of the Ionization Potential Electron Affinity (IPEA) shift (a parameter introduced in the zeroth-order Hamiltonian in the CASPT2 method to include the effect of two-electron terms) and show how its default value of 0.25 is not suitable for a proper description of the PES and of the spectroscopic parameters and must be changed to a more sound value of 0.45.
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Affiliation(s)
- Fernando Ruipérez
- Kimika Fakultatea, Euskal Herriko Unibertsitatea, and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Francesco Aquilante
- Department of Physical Chemistry, University of Geneva Chemical Center , 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Jesus M Ugalde
- Kimika Fakultatea, Euskal Herriko Unibertsitatea, and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Ivan Infante
- Kimika Fakultatea, Euskal Herriko Unibertsitatea, and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
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42
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Dietl N, van der Linde C, Schlangen M, Beyer MK, Schwarz H. Diatomic [CuO]+ and Its Role in the Spin-Selective Hydrogen- and Oxygen-Atom Transfers in the Thermal Activation of Methane. Angew Chem Int Ed Engl 2011; 50:4966-9. [DOI: 10.1002/anie.201100606] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Indexed: 11/10/2022]
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43
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Dietl N, van der Linde C, Schlangen M, Beyer MK, Schwarz H. Über die Rolle von [CuO]+ bei spinselektiven Wasserstoff- und Sauerstoff-Übertragungen in der Aktivierung von Methan. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100606] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Peterson RL, Himes RA, Kotani H, Suenobu T, Tian L, Siegler MA, Solomon EI, Fukuzumi S, Karlin KD. Cupric superoxo-mediated intermolecular C-H activation chemistry. J Am Chem Soc 2011; 133:1702-5. [PMID: 21265534 PMCID: PMC3091961 DOI: 10.1021/ja110466q] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The new cupric superoxo complex [LCu(II)(O(2)(•-))](+), which possesses particularly strong O-O and Cu-O bonding, is capable of intermolecular C-H activation of the NADH analogue 1-benzyl-1,4-dihydronicotinamide (BNAH). Kinetic studies indicated a first-order dependence on both the Cu complex and BNAH with a deuterium kinetic isotope effect (KIE) of 12.1, similar to that observed for certain copper monooxygenases.
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Affiliation(s)
- Ryan L. Peterson
- Johns Hopkins University, Baltimore, Maryland 21218
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | | | - Hiroaki Kotani
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tomoyoshi Suenobu
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Li Tian
- Department of Chemistry, Stanford University, Stanford, California 94305
| | | | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Shunichi Fukuzumi
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kenneth D. Karlin
- Johns Hopkins University, Baltimore, Maryland 21218
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
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45
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Li Manni G, Aquilante F, Gagliardi L. Strong correlation treated via effective hamiltonians and perturbation theory. J Chem Phys 2011; 134:034114. [DOI: 10.1063/1.3532927] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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46
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Li S, Wu J. Synthesis of H-Pyrazolo[5,1-a]isoquinolines via Copper(II)-Catalyzed Oxidation of an Aliphatic C−H Bond of Tertiary Amine in Air. Org Lett 2011; 13:712-5. [DOI: 10.1021/ol102939r] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shaoyu Li
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Jie Wu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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47
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Cholesky Decomposition Techniques in Electronic Structure Theory. CHALLENGES AND ADVANCES IN COMPUTATIONAL CHEMISTRY AND PHYSICS 2011. [DOI: 10.1007/978-90-481-2853-2_13] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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48
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Zhang X, Schwarz H. Bonding in cationic MOH n + (M = K − La, Hf − Rn; n = 0–2): DFT performances and periodic trends. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0861-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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49
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Zapata-Rivera J, Caballol R, Calzado CJ. Electronic structure and relative stability of 1:1 Cu-O2 adducts from difference-dedicated configuration interaction calculations. J Comput Chem 2010; 32:1144-58. [DOI: 10.1002/jcc.21697] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 09/13/2010] [Accepted: 09/13/2010] [Indexed: 11/11/2022]
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50
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Hong S, Gupta AK, Tolman WB. Intermediates in reactions of copper(I) complexes with N-oxides: from the formation of stable adducts to oxo transfer. Inorg Chem 2010; 48:6323-5. [PMID: 19425587 DOI: 10.1021/ic900435p] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Reactions of copper(I) complexes of bidentate N-donor supporting ligands with pyridine- and trimethylamine-N-oxides or PhIO were explored. Key results include the identification of novel copper(I) N-oxide adducts, aryl substituent hydroxylation, and bis(mu-oxo)dicopper complex formation via a route involving oxo transfer.
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Affiliation(s)
- Sungjun Hong
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, USA
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