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Nowicki M, Zaranek M, Grzelak M, Pawluć P, Hoffmann M. Mechanism of Silylation of Vinyl Arenes by Hydrodisiloxanes Driven by Stoichiometric Amounts of Sodium Triethylborohydride-A Combined DFT and Experimental Study. Int J Mol Sci 2023; 24:ijms24054924. [PMID: 36902355 PMCID: PMC10003527 DOI: 10.3390/ijms24054924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/27/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
The reactions of vinyl arenes with hydrodisiloxanes in the presence of sodium triethylborohydride were studied using experimental and computational methods. The expected hydrosilylation products were not detected because triethylborohydrides did not exhibit the catalytic activity observed in previous studies; instead, the product of formal silylation with dimethylsilane was identified, and triethylborohydride was consumed in stoichiometric amounts. In this article, the mechanism of the reaction is described in detail, with due consideration given to the conformational freedom of important intermediates and the two-dimensional curvature of the potential energy hypersurface cross sections. A simple way to reestablish the catalytic character of the transformation was identified and explained with reference to its mechanism. The reaction presented here is an example of the application of a simple transition-metal-free catalyst in the synthesis of silylation products, with flammable gaseous reagents replaced by a more convenient silane surrogate.
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Affiliation(s)
- Mateusz Nowicki
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Maciej Zaranek
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Centre for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Magdalena Grzelak
- Centre for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Piotr Pawluć
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Centre for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Marcin Hoffmann
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Correspondence:
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2
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Gong Y, Mou Q, Peng D, Wang F, Qin J, Qin J, Ding Y. New insight into the mechanism of Pt(0)-catalyzed hydrosilylation reaction of (CH 3) 3SiH with CH 2CHSi(CH 3) 3. J Mol Graph Model 2022; 117:108294. [PMID: 35969936 DOI: 10.1016/j.jmgm.2022.108294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/29/2022] [Accepted: 08/03/2022] [Indexed: 10/15/2022]
Abstract
The non-catalytic hydrosilylation reaction has much high activation energy due to large differences in the energy of HOMO-LUMO pairing and restriction of the orbital symmetry overlap. For Pt(0)-catalytic hydrosilylation, the electronic structure of Me3SiH has been modified by the oxidative addition of Pt(0). It not only narrows down the energy differences between the bonding orbitals but also improves the orbital overlap symmetry, leading to the effective decrease of the activation energy. The trouble for the Pt(0)-catalytic hydrosilylation is the formation of the majority of the Pt-containing intermediates. Because they are fallen into the deep potential-energy, the reductive eliminations are energetically prohibitive, which is the essence of Pt-contamination. The reductive elimination can be achieved with the ligand exchange method, and the energy barrier can be tuned by suitable ligands.
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Affiliation(s)
- Yingying Gong
- School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Qiuhong Mou
- Advanced Materials Institute, Shandong Academy of Science, Jinan, Shandong, 250014, PR China
| | - Dan Peng
- Advanced Materials Institute, Shandong Academy of Science, Jinan, Shandong, 250014, PR China
| | - Feng Wang
- Advanced Materials Institute, Shandong Academy of Science, Jinan, Shandong, 250014, PR China
| | - Jining Qin
- School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Jiaqi Qin
- School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Yunqiao Ding
- School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China.
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Ríos P, Rodríguez A, Conejero S. Activation of Si-H and B-H bonds by Lewis acidic transition metals and p-block elements: same, but different. Chem Sci 2022; 13:7392-7418. [PMID: 35872827 PMCID: PMC9241980 DOI: 10.1039/d2sc02324e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 05/18/2022] [Indexed: 01/01/2023] Open
Abstract
In this Perspective we discuss the ability of transition metal complexes to activate and cleave the Si-H and B-H bonds of hydrosilanes and hydroboranes (tri- and tetra-coordinated) in an electrophilic manner, avoiding the need for the metal centre to undergo two-electron processes (oxidative addition/reductive elimination). A formal polarization of E-H bonds (E = Si, B) upon their coordination to the metal centre to form σ-EH complexes (with coordination modes η1 or η2) favors this type of bond activation that can lead to reactivities involving the formation of transient silylium and borenium/boronium cations similar to those proposed in silylation and borylation processes catalysed by boron and aluminium Lewis acids. We compare the reactivity of transition metal complexes and boron/aluminium Lewis acids through a series of catalytic reactions in which pieces of evidence suggest mechanisms involving electrophilic reaction pathways.
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Affiliation(s)
- Pablo Ríos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica CSIC and Universidad de Sevilla, Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/Américo Vespucio 49 41092 Sevilla Spain
| | - Amor Rodríguez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica CSIC and Universidad de Sevilla, Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/Américo Vespucio 49 41092 Sevilla Spain
| | - Salvador Conejero
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica CSIC and Universidad de Sevilla, Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/Américo Vespucio 49 41092 Sevilla Spain
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Suárez-Pantiga S, Sanz R. Deoxygenation reactions in organic synthesis catalyzed by dioxomolybdenum(VI) complexes. Org Biomol Chem 2021; 19:10472-10492. [PMID: 34816863 DOI: 10.1039/d1ob01939b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Dioxomolybdenum(VI) complexes have been applied as efficient, inexpensive and benign catalysts to deoxygenation reactions of a diverse number of compounds in the last two decades. Dioxomolybdenum complexes have demonstrated wide applicability to the deoxygenation of sulfoxides into sulfides and reduction of N-O bonds. Even the challenging nitro functional group was efficiently deoxygenated, affording amines or diverse heterocycles after reductive cyclization reactions. More recently, carbon-based substrates like epoxides, alcohols and ketones have been successfully deoxygenated. Also, dioxomolybdenum complexes accomplished deoxydehydration (DODH) reactions of biomass-derived vicinal 1,2-diols, affording valuable alkenes. The choice of the catalytic systems and reductant is decisive to achieve the desired transformation. Commonly found reducing agents involved phosphorous-based compounds, silanes, molecular hydrogen, or even glycols and other alcohols.
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Affiliation(s)
- Samuel Suárez-Pantiga
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Pza, Misael Bañuelos, s/n, Universidad de Burgos, 09001 Burgos, Spain.
| | - Roberto Sanz
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Pza, Misael Bañuelos, s/n, Universidad de Burgos, 09001 Burgos, Spain.
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Assefa MK, Wu G, Hayton TW. Uranyl Oxo Silylation Promoted by Silsesquioxane Coordination. J Am Chem Soc 2020; 142:8738-8747. [PMID: 32292028 DOI: 10.1021/jacs.0c00990] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Mikiyas K. Assefa
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Trevor W. Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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Chen H, Wang W, Wei H. DFT study on mechanism of carbonyl hydrosilylation catalyzed by high-valent molybdenum (IV) hydrides. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.05.078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Chen H, Fang S, Wang J, Wei H. Nitrido complex of high-valent Ru(VI) -catalyzed reduction of imines and alkynes with hydrosilanes: A theoretical study of the reaction mechanism. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Zwettler N, Walg SP, Belaj F, Mösch‐Zanetti NC. Heterolytic Si-H Bond Cleavage at a Molybdenum-Oxido-Based Lewis Pair. Chemistry 2018; 24:7149-7160. [PMID: 29521459 PMCID: PMC6001527 DOI: 10.1002/chem.201800226] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Indexed: 12/15/2022]
Abstract
The reaction of a molybdenum(VI) oxido imido complex with the strong Lewis acid B(C6 F5 )3 gave access to the Lewis adduct [Mo{OB(C6 F5 )3 }(NtBu)L2 ] featuring reversible B-O bonding in solution. The resulting frustrated Lewis pair (FLP)-like reactivity is reflected by the compound's ability to heterolytically cleave Si-H bonds, leading to a clean formation of the novel cationic MoVI species 3 a (R=Et) and 3 b (R=Ph) of the general formula [Mo(OSiR3 )(NtBu)L2 ][HB(C6 F5 )3 ]. These compounds possess properties highly unusual for molybdenum d0 species such as an intensive, charge-transfer-based color as well as a reversible redox couple at very low potentials, both dependent on the silane used. Single-crystal X-ray diffraction analyses of 2 and 4 b, a derivative of 3 b featuring the [FB(C6 F5 )3 ]- anion, picture the stepwise elongation of the Mo=O bond, leading to a large increase in the electrophilicity of the metal center. The reaction of 3 a and 3 b with benzaldehyde allowed for the regeneration of compound 2 by hydrosilylation of the benzaldehyde. NMR spectroscopy suggested an unusual mechanism for the transformation, involving a substrate insertion in the B-H bond of the borohydride anion.
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Simon P. Walg
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Nadia C. Mösch‐Zanetti
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
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Lipke MC, Liberman-Martin AL, Tilley TD. Elektrophile Aktivierung von Silicium-Wasserstoff- Bindungen in katalytischen Hydrosilierungen. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201605198] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mark C. Lipke
- Department of Chemie; University of California, Berkeley; Berkeley CA 94720 USA
| | | | - T. Don Tilley
- Department of Chemie; University of California, Berkeley; Berkeley CA 94720 USA
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10
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Lipke MC, Liberman-Martin AL, Tilley TD. Electrophilic Activation of Silicon-Hydrogen Bonds in Catalytic Hydrosilations. Angew Chem Int Ed Engl 2017; 56:2260-2294. [DOI: 10.1002/anie.201605198] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Indexed: 01/06/2023]
Affiliation(s)
- Mark C. Lipke
- Department of Chemistry; University of California, Berkeley; Berkeley CA 94720 USA
| | | | - T. Don Tilley
- Department of Chemistry; University of California, Berkeley; Berkeley CA 94720 USA
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11
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Liu S, Li J, Jurca T, Stair PC, Lohr TL, Marks TJ. Efficient carbon-supported heterogeneous molybdenum-dioxo catalyst for chemoselective reductive carbonyl coupling. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00336f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective carbonyl coupling, high symmetric ether selectivity.
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Affiliation(s)
- Shengsi Liu
- Department of Chemistry
- Northwestern University
- Evanston
- USA
| | - Jiaqi Li
- Department of Chemistry
- Northwestern University
- Evanston
- USA
| | - Titel Jurca
- Department of Chemistry
- Northwestern University
- Evanston
- USA
| | - Peter C. Stair
- Department of Chemistry
- Northwestern University
- Evanston
- USA
- Chemical Sciences and Engineering Division
| | - Tracy L. Lohr
- Department of Chemistry
- Northwestern University
- Evanston
- USA
| | - Tobin J. Marks
- Department of Chemistry
- Northwestern University
- Evanston
- USA
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12
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Ning X, Wang J, Wei H. New Insights into Mechanism of Molybdenum(VI)–Dioxo Complex Catalyzed Hydrosilylation of Carbonyls: An Alternative Model for Activating Si–H Bond. J Phys Chem A 2016; 120:4167-78. [DOI: 10.1021/acs.jpca.6b01978] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoshuang Ning
- Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Jiangsu Provincial Key
Laboratory for NSLSCS, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Jiandi Wang
- Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Jiangsu Provincial Key
Laboratory for NSLSCS, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Haiyan Wei
- Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Jiangsu Provincial Key
Laboratory for NSLSCS, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
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13
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McLeod NA, Kuzmina LG, Korobkov I, Howard JAK, Nikonov GI. Hydridosilylamido complexes of Ta and Mo isolobal with Berry's zirconocenes: syntheses, β-Si-H agostic interactions, catalytic hydrosilylation, and insight into mechanism. Dalton Trans 2016; 45:2554-61. [PMID: 26727669 DOI: 10.1039/c5dt04548g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The syntheses of novel Group 5 and Group 6 hydrosilylamido complexes of the type R(ArN[double bond, length as m-dash])M{N((t)Bu)SiMe2-H}X (M = Ta, R = Cp; M = Mo, R = ArN; X = Cl, H, OBn, Me) are described. The various substituents in the X position seem to play the key role in determining the extent of β-agostic interaction with the Si-H bond. The Mo agostic hydrido complex (ArN[double bond, length as m-dash])2Mo{η(3)-N((t)Bu)SiMe2-H}H is a pre-catalyst for the hydrosilylation of carbonyls. The stoichiometric reaction between benzaldehyde and (ArN[double bond, length as m-dash])2Mo{η(3)-N((t)Bu)SiMe2-H}H gives the benzoxy complex (ArN[double bond, length as m-dash])2Mo{N((t)Bu)SiMe2-H}(OBn), which showed a similar catalytic reactivity compared to the parent hydride. Mechanistic studies suggest that a non-hydride mechanism is operative.
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Affiliation(s)
- Nicolas A McLeod
- Chemistry Department, Brock University, Niagara Region, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada.
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Huang L, Wang W, Wei X, Wei H. New insights into hydrosilylation of unsaturated carbon-heteroatom (C═O, C═N) bonds by rhenium(V)-dioxo complexes. J Phys Chem A 2015; 119:3789-99. [PMID: 25827215 DOI: 10.1021/acs.jpca.5b00567] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The hydrosilylation of unsaturated carbon-heteroatom (C═O, C═N) bonds catalyzed by high-valent rhenium(V)-dioxo complex ReO2I(PPh3)2 (1) were studied computationally to determine the underlying mechanism. Our calculations revealed that the ionic outer-sphere pathway in which the organic substrate attacks the Si center in an η(1)-silane rhenium adduct to prompt the heterolytic cleavage of the Si-H bond is the most energetically favorable process for rhenium(V)-dioxo complex 1 catalyzed hydrosilylation of imines. The activation energy of the turnover-limiting step was calculated to be 22.8 kcal/mol with phenylmethanimine. This value is energetically more favorable than the [2 + 2] addition pathway by as much as 10.0 kcal/mol. Moreover, the ionic outer-sphere pathway competes with the [2 + 2] addition mechanism for rhenium(V)-dioxo complex 1 catalyzing the hydrosilylation of carbonyl compounds. Furthermore, the electron-donating group on the organic substrates would induce a better activity favoring the ionic outer-sphere mechanistic pathway. These findings highlight the unique features of high-valent transition-metal complexes as Lewis acids in activating the Si-H bond and catalyzing the reduction reactions.
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Affiliation(s)
- Liangfang Huang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Provincial Key Laboratory for NSLSCS, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Wenmin Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Provincial Key Laboratory for NSLSCS, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Xiaoqin Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Provincial Key Laboratory for NSLSCS, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Haiyan Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Provincial Key Laboratory for NSLSCS, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
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Wang J, Wang W, Huang L, Yang X, Wei H. The unexpected mechanism underlying the high-valent mono-oxo-rhenium(V) hydride catalyzed hydrosilylation of C=N functionalities: insights from a DFT study. Chemphyschem 2015; 16:1052-60. [PMID: 25703794 DOI: 10.1002/cphc.201402610] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Indexed: 12/16/2022]
Abstract
In this study, we theoretically investigated the mechanism underlying the high-valent mono-oxo-rhenium(V) hydride Re(O)HCl2(PPh3)2 (1) catalyzed hydrosilylation of C=N functionalities. Our results suggest that an ionic S(N)2-Si outer-sphere pathway involving the heterolytic cleavage of the Si-H bond competes with the hydride pathway involving the C=N bond inserted into the Re-H bond for the rhenium hydride (1) catalyzed hydrosilylation of the less steric C=N functionalities (phenylmethanimine, PhCH=NH, and N-phenylbenzylideneimine, PhCH=NPh). The rate-determining free-energy barriers for the ionic outer-sphere pathway are calculated to be ∼28.1 and 27.6 kcal mol(-1), respectively. These values are slightly more favorable than those obtained for the hydride pathway (by ∼1-3 kcal mol(-1)), whereas for the large steric C=N functionality of N,1,1-tri(phenyl)methanimine (PhCPh=NPh), the ionic outer-sphere pathway (33.1 kcal mol(-1)) is more favorable than the hydride pathway by as much as 11.5 kcal mol(-1). Along the ionic outer-sphere pathway, neither the multiply bonded oxo ligand nor the inherent hydride moiety participate in the activation of the Si-H bond.
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Affiliation(s)
- Jiandi Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Provincial Key Laboratory for NSLSCS, Nanjing Normal University, Nanjing 210097 (China)
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Wang W, Wang J, Huang L, Wei H. Mechanistic insights into hydrogen generation for catalytic hydrolysis and alcoholysis of silanes with high-valent oxorhenium(v) complexes. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01259c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The ionic outer-sphere pathway, which proceeds via the nucleophilic anti attack of water or alcohol on the silicon atom is the most favorable pathway for the high-valent oxorhenium(v) complex-catalyzed hydrolysis/alcoholysis of organosilanes.
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Affiliation(s)
- Wenmin Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210046
| | - Jiandi Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210046
| | - Liangfang Huang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210046
| | - Haiyan Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210046
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Nakatani N, Hasegawa JY, Sunada Y, Nagashima H. Platinum-catalyzed reduction of amides with hydrosilanes bearing dual Si–H groups: a theoretical study of the reaction mechanism. Dalton Trans 2015; 44:19344-56. [DOI: 10.1039/c5dt02767e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A platinum-catalyzed hydrosilane reduction of amides proceeds via the classical Chalk–Harrod mechanism with dual Si–H groups.
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Affiliation(s)
| | | | - Yusuke Sunada
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | - Hideo Nagashima
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
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18
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Huang L, Wang J, Wei X, Wei H. Does a multiply bonded oxo ligand directly participate in B–H bond activation by a high-valent di-oxo-molybdenum(vi) complex? A density functional theory study. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00177c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The multiply bonded oxo ligand does not participate in the activation of the B–H bond with organic substrates of amides, amines, and nitriles by the high-valent oxo-molybdenum complex MoO2Cl2.
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Affiliation(s)
- Liangfang Huang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Jiandi Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Xiaoqin Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Haiyan Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
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Huang L, Zhang Y, Wei H. Role of the Isolable Hydride Intermediate in the Hydrosilylation of Carbonyl Compounds Catalyzed by the High-Valent Mono-Oxido-Rhenium(V) Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402464] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Wang W, Gu P, Wang Y, Wei H. Theoretical Study of POCOP-Pincer Iridium(III)/Iron(II) Hydride Catalyzed Hydrosilylation of Carbonyl Compounds: Hydride Not Involved in the Iridium(III) System but Involved in the Iron(II) System. Organometallics 2014. [DOI: 10.1021/om400634w] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Wenmin Wang
- Jiangsu
Key Laboratory of Biofunctional Materials, School of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory for NSLSCS, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Piao Gu
- Jiangsu
Key Laboratory of Biofunctional Materials, School of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory for NSLSCS, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Yiou Wang
- Jiangsu
Key Laboratory of Biofunctional Materials, School of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory for NSLSCS, Nanjing Normal University, Nanjing 210097, People’s Republic of China
| | - Haiyan Wei
- Jiangsu
Key Laboratory of Biofunctional Materials, School of Chemistry and
Materials Science, Jiangsu Provincial Key Laboratory for NSLSCS, Nanjing Normal University, Nanjing 210097, People’s Republic of China
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21
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Wang Y, Gu P, Wang W, Wei H. Heterolytic cleavage of Si–H bonds: reduction of imines using silane/high-valent oxo-molybdenum MoO2Cl2as a catalyst. Catal Sci Technol 2014. [DOI: 10.1039/c3cy00727h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Huang L, Wei H. Mechanistic insights into B–H bond activation with the high-valent oxo-molybdenum complex MoO2Cl2. NEW J CHEM 2014. [DOI: 10.1039/c4nj01188k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ionic mechanistic model involving the heterolytic cleavage of the B–H bond is slightly energetically favorable than the [2+2] addition mechanism for the high-valent oxo-molybdenum complex MoO2Cl2activating the B–H bond.
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Affiliation(s)
- Liangfang Huang
- Jiangsu Key Laboratory of Biofunctional Materials
- School of Chemistry and Materials Science
- Jiangsu Provincial Key Laboratory for NSLSCS
- Nanjing Normal University
- Nanjing 210097, China
| | - Haiyan Wei
- Jiangsu Key Laboratory of Biofunctional Materials
- School of Chemistry and Materials Science
- Jiangsu Provincial Key Laboratory for NSLSCS
- Nanjing Normal University
- Nanjing 210097, China
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23
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Chidara VK, Du G. An Efficient Catalyst Based on Manganese Salen for Hydrosilylation of Carbonyl Compounds. Organometallics 2013. [DOI: 10.1021/om400805v] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Vamshi K. Chidara
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Guodong Du
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
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24
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Khalimon AY, Ignatov SK, Okhapkin AI, Simionescu R, Kuzmina LG, Howard JAK, Nikonov GI. Unusual structure, fluxionality, and reaction mechanism of carbonyl hydrosilylation by silyl hydride complex [(ArN=)Mo(H)(SiH2Ph)(PMe3)3]. Chemistry 2013; 19:8573-90. [PMID: 23671027 DOI: 10.1002/chem.201300376] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Indexed: 11/12/2022]
Abstract
The reactions of bis(borohydride) complexes [(RN=)Mo(BH4)2(PMe3)2] (4: R = 2,6-Me2C6H3; 5: R = 2,6-iPr2C6H3) with hydrosilanes afford new silyl hydride derivatives [(RN=)Mo(H)(SiR'3)(PMe3)3] (3: R = Ar, R'3 = H2Ph; 8: R = Ar', R'3 = H2Ph; 9: R = Ar, R'3 = (OEt)3; 10: R = Ar, R'3 = HMePh). These compounds can also be conveniently prepared by reacting [(RN=)Mo(H)(Cl)(PMe3)3] with one equivalent of LiBH4 in the presence of a silane. Complex 3 undergoes intramolecular and intermolecular phosphine exchange, as well as exchange between the silyl ligand and the free silane. Kinetic and DFT studies show that the intermolecular phosphine exchange occurs through the predissociation of a PMe3 group, which, surprisingly, is facilitated by the silane. The intramolecular exchange proceeds through a new non-Bailar-twist pathway. The silyl/silane exchange proceeds through an unusual Mo(VI) intermediate, [(ArN=)Mo(H)2(SiH2Ph)2(PMe3)2] (19). Complex 3 was found to be the catalyst of a variety of hydrosilylation reactions of carbonyl compounds (aldehydes and ketones) and nitriles, as well as of silane alcoholysis. Stoichiometric mechanistic studies of the hydrosilylation of acetone, supported by DFT calculations, suggest the operation of an unexpected mechanism, in that the silyl ligand of compound 3 plays an unusual role as a spectator ligand. The addition of acetone to compound 3 leads to the formation of [trans-(ArN)Mo(OiPr)(SiH2Ph)(PMe3)2] (18). This latter species does not undergo the elimination of a Si-O group (which corresponds to the conventional Ojima's mechanism of hydrosilylation). Rather, complex 18 undergoes unusual reversible β-CH activation of the isopropoxy ligand. In the hydrosilylation of benzaldehyde, the reaction proceeds through the formation of a new intermediate bis(benzaldehyde) adduct, [(ArN=)Mo(η(2)-PhC(O)H)2(PMe3)], which reacts further with hydrosilane through a η(1)-silane complex, as studied by DFT calculations.
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Affiliation(s)
- Andrey Y Khalimon
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada
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25
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Abbina S, Bian S, Oian C, Du G. Scope and Mechanistic Studies of Catalytic Hydrosilylation with a High-Valent Nitridoruthenium(VI). ACS Catal 2013. [DOI: 10.1021/cs300848h] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Srinivas Abbina
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
| | - Shi Bian
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
| | - Casey Oian
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
| | - Guodong Du
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
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26
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Gu P, Wang W, Wang Y, Wei H. Hydrosilylation of Carbonyls Catalyzed by the Rhenium(V) Oxo Complex [Re(O)(hoz)2]+—A Non-Hydride Pathway. Organometallics 2012. [DOI: 10.1021/om300605j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Piao Gu
- Jiangsu Key Laboratory of Biofunctional
Materials, School of Chemistry
and Materials Science, Jiangsu Provincial Key Laboratory
for NSLSCS, Nanjing Normal University,
Nanjing 210097, People's Republic of China
| | - Wenmin Wang
- Jiangsu Key Laboratory of Biofunctional
Materials, School of Chemistry
and Materials Science, Jiangsu Provincial Key Laboratory
for NSLSCS, Nanjing Normal University,
Nanjing 210097, People's Republic of China
| | - Yiou Wang
- Jiangsu Key Laboratory of Biofunctional
Materials, School of Chemistry
and Materials Science, Jiangsu Provincial Key Laboratory
for NSLSCS, Nanjing Normal University,
Nanjing 210097, People's Republic of China
| | - Haiyan Wei
- Jiangsu Key Laboratory of Biofunctional
Materials, School of Chemistry
and Materials Science, Jiangsu Provincial Key Laboratory
for NSLSCS, Nanjing Normal University,
Nanjing 210097, People's Republic of China
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27
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Gajewy J, Gawronski J, Kwit M. Mechanism and Enantioselectivity of [Zinc(diamine)(diol)]-Catalyzed Asymmetric Hydrosilylation of Ketones: DFT, NMR and ECD Studies. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200992] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Taige MA, Ahrens S, Strassner T. Platinum(II)-bis-(N-heterocyclic carbene) complexes: synthesis, structure and catalytic activity in the hydrosilylation of alkenes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.04.030] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Sherbrooke O, Kuzmina LG, Nikonov GI. Nonhydride mechanism of metal-catalyzed hydrosilylation. J Am Chem Soc 2011; 133:6487-9. [PMID: 21476545 DOI: 10.1021/ja111748u] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 1:1:1 reaction between complex (Tp)(ArN═)Mo(H)(PMe(3)) (3), silane PhSiD(3), and carbonyl substrate established that hydrosilylation catalyzed by 3 is not accompanied by deuterium incorporation into the hydride position of the catalyst, thus ruling out the conventional hydride mechanism based on carbonyl insertion into the M-H bond. An analogous result was observed for the catalysis by (O═)(PhMe(2)SiO)Re(PPh(3))(2)(I)(H) and (Ph(3)PCuH)(6).
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Affiliation(s)
- Oleg Sherbrooke
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
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30
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Bonnet J, Bounor-Legaré V, Boisson F, Mélis F, Cassagnau P. Efficient carbonyl hydrosilylation reaction: Toward EVA copolymer crosslinking. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24725] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Sherbrooke O, Gorelsky SI, Simionescu R, Kuzmina LG, Nikonov GI. The unexpected mechanism of carbonyl hydrosilylation catalyzed by (Cp)(ArN[double bond, length as m-dash])Mo(H)(PMe(3)). Chem Commun (Camb) 2010; 46:7831-7833. [PMID: 20856991 DOI: 10.1039/c0cc01850c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
Complex (Cp)(ArN[double bond, length as m-dash])Mo(H)(PMe(3)) (2, Ar = 2,6-diisopropylphenyl) catalyzes the hydrosilylation of carbonyls by an unexpected associative mechanism. Complex 2 also reacts with PhSiH(3) by a σ-bond metathesis mechanism to give the silyl derivative (Cp)(ArN[double bond, length as m-dash])Mo(SiH(2)Ph)(PMe(3)).
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Affiliation(s)
- Oleg Sherbrooke
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
| | - Serge I Gorelsky
- Center for Catalysis Research and Innovation, University of Ottawa, 30 Marie Curie Street, Ottawa, ON, Canada, K1N 6N5.
| | - Razvan Simionescu
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
| | - Lyudmila G Kuzmina
- Kurnakov Institute of General and Inorganic Chemistry, 31 Leninsky prospect, Moscow, 119991, Russia.
| | - Georgii I Nikonov
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
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32
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Ziegler JE, Du G, Fanwick PE, Abu-Omar MM. An efficient method for the preparation of oxo molybdenum salalen complexes and their unusual use as hydrosilylation catalysts. Inorg Chem 2010; 48:11290-6. [PMID: 19845326 DOI: 10.1021/ic901794h] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A number of molybdenum(VI) dioxo salalen complexes were prepared from the reaction of Mo(CO)(6) and salen ligands containing bulky substituents, providing a novel and facile entry to Mo-salalen compounds. Two of the complexes were characterized by single-crystal X-ray diffraction. Reduction with organic phosphines or silanes afforded the monooxo molybdenum(IV) complexes, along with dinuclear molybdenum(V) species featuring a bridged oxo ligand (mu-O). One of the dinuclear complexes as well as a molybdenum(VI) dioxo salan complex was characterized structurally. All of the molybdenum compounds except the monooxo molybdenum(IV) were fully characterized by NMR, mass spectrometry, and elemental analyses. Investigations of acetophenone and 4-Ph-2-butanone reduction with PhSiH(3) showed that all of these molybdenum oxo complexes could serve as catalysts at reasonably low loading (1 mol % Mo) and approximately 110 degrees C. The time profiles and efficacy of catalysis varied depending on the precursor form of the catalyst, Mo(VI)(O)(2) vs (O)Mo(V)-O-Mo(V)(O) vs Mo(IV)(O). Solvent effects, radical scavenger probes, and other mechanistic considerations reveal that the monooxo molybdenum(IV) is the most likely active form of the catalyst.
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Affiliation(s)
- Jeanette E Ziegler
- Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
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33
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Abramenko VL, Sergienko VS. Synthesis and structure of mononuclear molecular complexes of molybdenum(VI) and tungsten(VI) oxy- and dioxyhalides. RUSS J INORG CHEM+ 2009. [DOI: 10.1134/s0036023609130014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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José Calhorda M, Jorge Costa P. Expanding the role of oxo-molybdenum(vi) catalysts: a DFT interpretation of X–H activation leading to reduction or oxidation. Dalton Trans 2009:8155-61. [DOI: 10.1039/b910207h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Lakmini H, Ciofini I, Jutand A, Amatore C, Adamo C. Pd-Catalyzed Homocoupling Reaction of Arylboronic Acid: Insights from Density Functional Theory. J Phys Chem A 2008; 112:12896-903. [DOI: 10.1021/jp801948u] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Lakmini
- Laboratoire d’Electrochimie et Chimie Analytique, Ecole Nationale Supérieure de Chimie, UMR CNRS 7575, 11 Rue Pierre et Marie Curie, F-75231 Paris Cedex 5, France, and Département de Chimie, Ecole Normale Supérieure, UMR CNRS-ENS-UPMC 8640, 24 Rue Lhomond, F-75231 Paris Cedex 5, France
| | - I. Ciofini
- Laboratoire d’Electrochimie et Chimie Analytique, Ecole Nationale Supérieure de Chimie, UMR CNRS 7575, 11 Rue Pierre et Marie Curie, F-75231 Paris Cedex 5, France, and Département de Chimie, Ecole Normale Supérieure, UMR CNRS-ENS-UPMC 8640, 24 Rue Lhomond, F-75231 Paris Cedex 5, France
| | - A. Jutand
- Laboratoire d’Electrochimie et Chimie Analytique, Ecole Nationale Supérieure de Chimie, UMR CNRS 7575, 11 Rue Pierre et Marie Curie, F-75231 Paris Cedex 5, France, and Département de Chimie, Ecole Normale Supérieure, UMR CNRS-ENS-UPMC 8640, 24 Rue Lhomond, F-75231 Paris Cedex 5, France
| | - C. Amatore
- Laboratoire d’Electrochimie et Chimie Analytique, Ecole Nationale Supérieure de Chimie, UMR CNRS 7575, 11 Rue Pierre et Marie Curie, F-75231 Paris Cedex 5, France, and Département de Chimie, Ecole Normale Supérieure, UMR CNRS-ENS-UPMC 8640, 24 Rue Lhomond, F-75231 Paris Cedex 5, France
| | - C. Adamo
- Laboratoire d’Electrochimie et Chimie Analytique, Ecole Nationale Supérieure de Chimie, UMR CNRS 7575, 11 Rue Pierre et Marie Curie, F-75231 Paris Cedex 5, France, and Département de Chimie, Ecole Normale Supérieure, UMR CNRS-ENS-UPMC 8640, 24 Rue Lhomond, F-75231 Paris Cedex 5, France
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36
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Reis PM, Costa PJ, Romão CC, Fernandes JA, Calhorda MJ, Royo B. Hydrogen activation by high-valent oxo-molybdenum(vi) and -rhenium(vii) and -(v) compounds. Dalton Trans 2008:1727-33. [DOI: 10.1039/b719375k] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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