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Gutiérrez-Blanco M, Algarra AG, Guillamón E, Fernández-Trujillo MJ, Oliva M, Basallote MG, Llusar R, Safont VS. Spin-Crossing in the ( Z)-Selective Alkyne Semihydrogenation Mechanism Catalyzed by Mo 3S 4 Clusters: A Density Functional Theory Exploration. Inorg Chem 2024; 63:1000-1009. [PMID: 38173271 DOI: 10.1021/acs.inorgchem.3c03057] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Semihydrogenation of internal alkynes catalyzed by the air-stable imidazolyl amino [Mo3S4Cl3(ImNH2)3]+ cluster selectively affords the (Z)-alkene under soft conditions in excellent yields. Experimental results suggest a sulfur-based mechanism with the formation of a dithiolene adduct through interaction of the alkyne with the bridging sulfur atoms. However, computational studies indicate that this mechanism is unable to explain the experimental outcome: mild reaction conditions, excellent selectivity toward the (Z)-isomer, and complete deuteration of the vinylic positions in the presence of CD3OD and CH3OD. An alternative mechanism that explains the experimental results is proposed. The reaction begins with the hydrogenation of two of the Mo3(μ3-S)(μ-S)3 bridging sulfurs to yield a bis(hydrosulfide) intermediate that performs two sequential hydrogen atom transfers (HAT) from the S-H groups to the alkyne. The first HAT occurs with a spin change from singlet to triplet. After the second HAT, the singlet state is recovered. Although the dithiolene adduct is more stable than the hydrosulfide species, the large energy required for the subsequent H2 addition makes the system evolve via the second alternative pathway to selectively render the (Z)-alkene with a lower overall activation barrier.
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Affiliation(s)
- María Gutiérrez-Blanco
- Departament de Química Física i Analítica, Universitat Jaume I, Av. Sos Baynat s/n, Castelló 12071, Spain
| | - Andrés G Algarra
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Instituto de Biomoléculas (INBIO), Facultad de Ciencias, Universidad de Cádiz, Apartado 40, Puerto Real, Cádiz 11510, Spain
| | - Eva Guillamón
- Departament de Química Física i Analítica, Universitat Jaume I, Av. Sos Baynat s/n, Castelló 12071, Spain
| | - M Jesús Fernández-Trujillo
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Instituto de Biomoléculas (INBIO), Facultad de Ciencias, Universidad de Cádiz, Apartado 40, Puerto Real, Cádiz 11510, Spain
| | - Mónica Oliva
- Departament de Química Física i Analítica, Universitat Jaume I, Av. Sos Baynat s/n, Castelló 12071, Spain
| | - Manuel G Basallote
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Instituto de Biomoléculas (INBIO), Facultad de Ciencias, Universidad de Cádiz, Apartado 40, Puerto Real, Cádiz 11510, Spain
| | - Rosa Llusar
- Departament de Química Física i Analítica, Universitat Jaume I, Av. Sos Baynat s/n, Castelló 12071, Spain
| | - Vicent S Safont
- Departament de Química Física i Analítica, Universitat Jaume I, Av. Sos Baynat s/n, Castelló 12071, Spain
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Pluth MD, Tonzetich ZJ. Hydrosulfide complexes of the transition elements: diverse roles in bioinorganic, cluster, coordination, and organometallic chemistry. Chem Soc Rev 2020; 49:4070-4134. [DOI: 10.1039/c9cs00570f] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Molecules containing transition metal hydrosulfide linkages are diverse, spanning a variety of elements, coordination environments, and redox states, and carrying out multiple roles across several fields of chemistry.
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Affiliation(s)
- Michael D. Pluth
- Department of Chemistry and Biochemistry
- Materials Science Institute
- Knight Campus for Accelerating Scientific Impact
- Institute of Molecular Biology
- University of Oregon
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Robinson WE, Bassegoda A, Reisner E, Hirst J. Oxidation-State-Dependent Binding Properties of the Active Site in a Mo-Containing Formate Dehydrogenase. J Am Chem Soc 2017; 139:9927-9936. [PMID: 28635274 PMCID: PMC5532686 DOI: 10.1021/jacs.7b03958] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Molybdenum-containing formate dehydrogenase H from Escherichia coli (EcFDH-H) is a powerful model system for studies of the reversible reduction of CO2 to formate. However, the mechanism of FDH catalysis is currently under debate, and whether the primary Mo coordination sphere remains saturated or one of the ligands dissociates to allow direct substrate binding during turnover is disputed. Herein, we describe how oxidation-state-dependent changes at the active site alter its inhibitor binding properties. Using protein film electrochemistry, we show that formate oxidation by EcFDH-H is inhibited strongly and competitively by N3-, OCN-, SCN-, NO2-, and NO3-, whereas CO2 reduction is inhibited only weakly and not competitively. During catalysis, the Mo center cycles between the formal Mo(VI)═S and Mo(IV)-SH states, and by modeling chronoamperometry data recorded at different potentials and substrate and inhibitor concentrations, we demonstrate that both formate oxidation and CO2 reduction are inhibited by selective inhibitor binding to the Mo(VI)═S state. The strong dependence of inhibitor-binding affinity on both Mo oxidation state and inhibitor electron-donor strength indicates that inhibitors (and substrates) bind directly to the Mo center. We propose that inhibitors bind to the Mo following dissociation of a selenocysteine ligand to create a vacant coordination site for catalysis and close by considering the implications of our data for the mechanisms of formate oxidation and CO2 reduction.
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Affiliation(s)
- William E Robinson
- Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K
| | - Arnau Bassegoda
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge , Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge CB2 0XY, U.K
| | - Erwin Reisner
- Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K
| | - Judy Hirst
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge , Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge CB2 0XY, U.K
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Olechnowicz F, Hillhouse GL, Jordan RF. Synthesis and Reactivity of NHC-Supported Ni2(μ2-η2,η2-S2)-Bridging Disulfide and Ni2(μ-S)2-Bridging Sulfide Complexes. Inorg Chem 2015; 54:2705-12. [DOI: 10.1021/ic502892r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Frank Olechnowicz
- Gordon Center for Integrative Science, Department of
Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Gregory L. Hillhouse
- Gordon Center for Integrative Science, Department of
Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Richard F. Jordan
- Gordon Center for Integrative Science, Department of
Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
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Duval S, Marrot J, Simonnet-Jégat C, Mbomekallé IM, Sokolov M, Cadot E. {AsW9O33}–{Mo3S4} based polyoxometalates including a metal–metal bond with Pd or Ni. Synthesis, structure and studies in solution. Dalton Trans 2012; 41:3174-84. [DOI: 10.1039/c2dt11420h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shatnawi MY, Tanash SA, Al-Ahmad SA, Challen PR, Henkel G. Synthesis and Characterization of Allylic Dinuclear Molybdenum Complexes with Bridging Oxygen and Sulfur Containing Ligands. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20090148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Appel AM, Lee SJ, Franz JA, DuBois DL, DuBois MR. Free energy landscapes for S-H bonds in Cp*2Mo2S4 complexes. J Am Chem Soc 2009; 131:5224-32. [PMID: 19309157 DOI: 10.1021/ja8093179] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An extensive family of thermochemical data is presented for a series of complexes derived from Cp*Mo(mu-S)(2)(mu-SMe)(mu-SH)MoCp* and Cp*Mo(mu-S)(2)(mu-SH)(2)MoCp*. These data include electrochemical potentials, pK(a) values, homolytic solution bond dissociation free energies (SBDFEs), and hydride donor abilities in acetonitrile. Thermochemical data ranged from +0.6 to -2.0 V vs FeCp(2)(+/o) for electrochemical potentials, 5 to 31 for pK(a) values, 43 to 68 kcal/mol for homolytic SBDFEs, and 44 to 84 kcal/mol for hydride donor abilities. The observed values for these thermodynamic parameters are comparable to those of many transition metal hydrides, which is consistent with the many parallels in the chemistry of these two classes of compounds. The extensive set of thermochemical data is presented in free energy landscapes as a useful approach to visualizing and understanding the relative stabilities of all of the species under varying conditions of pH and H(2) overpressure. In addition to the previously studied homogeneous reactivity and catalysis, Mo(2)S(4) complexes are also models for heterogeneous molybdenum sulfide catalysts, and therefore, the present results demonstrate the dramatic range of S-H bond strengths available in both homogeneous and heterogeneous reaction pathways.
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Affiliation(s)
- Aaron M Appel
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA
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Appel AM, Lee SJ, Franz JA, DuBois DL, Rakowski DuBois M, Twamley B. Determination of S−H Bond Strengths in Dimolybdenum Tetrasulfide Complexes. Organometallics 2009. [DOI: 10.1021/om800875n] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aaron M. Appel
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and the Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - Suh-Jane Lee
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and the Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - James A. Franz
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and the Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - Daniel L. DuBois
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and the Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - M. Rakowski DuBois
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and the Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - Brendan Twamley
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and the Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
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Appel AM, Lee SJ, Franz JA, DuBois DL, Rakowski DuBois M, Birnbaum JC, Twamley B. Formation and Reactivity of a Persistent Radical in a Dinuclear Molybdenum Complex. J Am Chem Soc 2008; 130:8940-51. [DOI: 10.1021/ja078115r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aaron M. Appel
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - Suh-Jane Lee
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - James A. Franz
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - Daniel L. DuBois
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - M. Rakowski DuBois
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - Jerome C. Birnbaum
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
| | - Brendan Twamley
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, and Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343
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Kramarz KW, Norton JR. Slow Proton-Transfer Reactions in Organometallic and Bioinorganic Chemistry. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166437.ch1] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Franz JA, Birnbaum JC, Kolwaite DS, Linehan JC, Camaioni DM, Dupuis M. Activation of the Sulfhydryl Group by Mo Centers: Kinetics of Reaction of Benzyl Radical with a Binuclear Mo(μ-SH)Mo Complex and with Arene and Alkane Thiols. J Am Chem Soc 2004; 126:6680-91. [PMID: 15161296 DOI: 10.1021/ja049321r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper provides evidence from kinetic experiments and electronic structure calculations of a significantly reduced S-H bond strength in the Mo(micro-SH)Mo function in the homogeneous catalyst model, CpMo(micro-S)(2)(micro-SH)(2)MoCp (1, Cp = eta(5)-cyclopentadienyl). The reactivity of 1 was explored by determination of a rate expression for hydrogen atom abstraction by benzyl radical from 1 (log(k(abs)/M(-)(1) s(-)(1)) = (9.07 +/- 0.38) - (3.62 +/- 0.58)/theta) for comparison with expressions for CH(3)(CH(2))(7)SH, log(k(abs)/M(-)(1) s(-)(1)) = (7.88 +/- 0.35) - (4.64 +/- 0.54)/theta, and for 2-mercaptonaphthalene, log(k(abs)/M(-)(1) s(-)(1)) = (8.21 +/- 0.17) - (4.24 +/- 0.26)/theta (theta = 2.303RT kcal/mol, 2sigma error). The rate constant for hydrogen atom abstraction at 298 K by benzyl radical from 1 is 2 orders of magnitude greater than that from 1-octanethiol, resulting from the predicted (DFT) S-H bond strength of 1 of 73 kcal/mol. The radical CpMo(micro-S)(3)(micro-SH)MoCp, 2, is revealed, from the properties of slow self-reaction, and exclusive cross-combination with reactive benzyl radical, to be a persistent free radical.
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Affiliation(s)
- James A Franz
- The Pacific Northwest National Laboratory, PO Box 999, Richland, Washington 99352, USA.
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Adams RD, Kwon OS, Smith MD. New evidence on the factors affecting bridging and semibridging character of carbonyl ligands. The structures of Mn2(CO)7(μ-SCH2CH2S) and its phosphine derivatives Mn2(CO)7-X(PMe2Ph)X(μ-SCH2CH2S), × = 1,2. Isr J Chem 2001. [DOI: 10.1560/2ly5-kgwm-1je1-h1h0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Nishibayashi Y, Wakiji I, Hirata K, DuBois MR, Hidai M. Protonation of coordinated N2 on tungsten with H2 mediated by sulfido-bridged dinuclear molybdenum complexes. Inorg Chem 2001; 40:578-80. [PMID: 11209623 DOI: 10.1021/ic000716v] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y Nishibayashi
- Department of Chemistry and Biotechnology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Hanif KM, Kabir SE, Mottalib M, Hursthouse MB, Malik K, Rosenberg E. Dithiolate complexes of ruthenium and osmium: X-ray structures of [Ru2(CO)6(μ-SCH2CH2S)] and [{(μ-H)M3(CO)10)}2(μ-SCH2CH2CH2S)] (M=Ru, Os). Polyhedron 2000. [DOI: 10.1016/s0277-5387(00)00353-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Adams RD, Perrin JL. Butenedithiolate triosmium cluster complexes from the reaction of Os3(CO)10(NCMe)2 with 3,6-dihydro-1,2-dithiin. J Organomet Chem 1999. [DOI: 10.1016/s0022-328x(98)01178-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Rakowski^DuBois M. Carbon-chalcogen bond cleavage reactions characterized for dinuclear sulfur-bridged cyclopentadienyl molybdenum complexes. Polyhedron 1997. [DOI: 10.1016/s0277-5387(96)00522-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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DuBois MR. Reactions of cationic dinuclear molybdenum complexes containing ?-sulfido and ?-thiolate ligands. J CLUST SCI 1996. [DOI: 10.1007/bf01171185] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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