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Implication of oxidant activation on olefin epoxidation catalysed by Molybdenum catalysts with aroylhydrazonato ligands: Experimental and theoretical studies. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111764] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Selective oxidation of benzyl alcohols to benzaldehydes catalyzed by dioxomolybdenum Schiff base complex: synthesis, spectral characterization, crystal structure, theoretical and computational studies. TRANSIT METAL CHEM 2021. [DOI: 10.1007/s11243-021-00460-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3
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Lyophilization-based synthesis of HKUST-1 encapsulated molybdenyl acetylacetonate nanocrystals: An effective soybean oil epoxidation catalyst. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2016.11.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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4
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Cindrić M, Pavlović G, Katava R, Agustin D. Towards a global greener process: from solvent-less synthesis of molybdenum(vi) ONO Schiff base complexes to catalyzed olefin epoxidation under organic-solvent-free conditions. NEW J CHEM 2017. [DOI: 10.1039/c6nj03174a] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schiff base ligands and corresponding molybdenum(vi) complexes, prepared using classical and/or mechanochemical methods, were active as epoxidation pre(catalysts).
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Affiliation(s)
- Marina Cindrić
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Horvatovac 102a
- HR-10000 Zagreb
| | - Gordana Pavlović
- University of Zagreb
- Faculty of Textile Technology
- Department of Applied Chemistry
- Prilaz Baruna Filipovića 28a
- HR-10000 Zagreb
| | - Robert Katava
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Horvatovac 102a
- HR-10000 Zagreb
| | - Dominique Agustin
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- 205 route de Narbonne
- BP 44099
- F-31077 Toulouse Cedex 4
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Conte M, Hippler M. Dynamic NMR and Quantum-Chemical Study of the Stereochemistry and Stability of the Chiral MoO2(acac)2 Complex in Solution. J Phys Chem A 2016; 120:6677-87. [PMID: 27510306 DOI: 10.1021/acs.jpca.6b03563] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The stereochemistry and dynamics of MoO2(acac)2 in benzene, chloroform, and toluene were investigated by variable temperature (1)H NMR, density functional theory (SOGGA11-X, B3LYP), and ab initio (MP2) methods. In solution, an equilibrium between two chiral enantiomers with C2 symmetry was identified, Λ-cis-MoO2(acac)2 and Δ-cis-MoO2(acac)2. The two enantiomers are connected via achiral cis transition states that switch the enantiomeric conformations via a Ray-Dutt, Bailar, and a newly described racemization twisting mechanism. All three mechanisms have similar calculated activation energies. Activation parameters Ea, ΔH(‡), and ΔS(‡) were experimentally determined for the exchange process, with a small, negative ΔS(‡), and a positive ΔH(‡) of 68.1 kJ mol(-1) in benzene, 54.9 kJ mol(-1) in chloroform, and 60.6 kJ mol(-1) in toluene, in reasonable general agreement with the calculations. Trans configurations of MoO2(acac)2 are very much higher in energy than cis and are not relevant in the temperature range experimentally studied, 243-340 K. The enantiomers interconvert within seconds near room temperature and much faster at elevated temperatures. Racemization will thus prevent the use of enantiomerically pure MoO2(acac)2 for chiral catalysis under practical conditions.
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Affiliation(s)
- Marco Conte
- Department of Chemistry, University of Sheffield , Sheffield S3 7HF, United Kingdom
| | - Michael Hippler
- Department of Chemistry, University of Sheffield , Sheffield S3 7HF, United Kingdom
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6
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Catalytic Epoxidation of Cyclohexene with Tert-butylhydroperoxide Using an Immobilized Molybdenum Catalyst. Top Catal 2015. [DOI: 10.1007/s11244-015-0373-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Long Y, Yuan B, Ma J. Epoxidation of alkenes efficiently catalyzed by Mo salen supported on surface-modified halloysite nanotubes. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(14)60244-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Maurya MR, Dhaka S, Avecilla F. Oxidation of secondary alcohols by conventional and microwave-assisted methods using molybdenum complexes of ONO donor ligands. NEW J CHEM 2015. [DOI: 10.1039/c4nj02208d] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxidation of secondary alcohols by conventional liquid phase and microwave-assisted methods using molybdenum complexes is reported.
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Affiliation(s)
- Mannar R. Maurya
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee 247 667
- India
| | - Sarita Dhaka
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee 247 667
- India
| | - Fernando Avecilla
- Departamento de Química Fundamental
- Universidade da Coruña
- 15071 A Coruña
- Spain
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Lazar A, Thiel WR, Singh AP. Synthesis and characterization of 3-[N,N′-bis-3-(salicylidenamino)ethyltriamine] Mo(vi)O2@SBA-15: a highly stable and reusable catalyst for epoxidation and sulfoxidation reactions. RSC Adv 2014. [DOI: 10.1039/c3ra47222a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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10
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Araghi M, Ghorbani A, Yeganeh FE. Efficient oxidation of alcohols with tert-butyl hydroperoxide catalyzed by Mo(CO)6 supported on multiwall carbon nanotubes. CR CHIM 2013. [DOI: 10.1016/j.crci.2012.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Morlot J, Uyttebroeck N, Agustin D, Poli R. Solvent-Free Epoxidation of Olefins Catalyzed by “[MoO2(SAP)]”: A New Mode oftert-Butylhydroperoxide Activation. ChemCatChem 2012. [DOI: 10.1002/cctc.201200068] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Molybdenum hexacarbonyl supported on functionalized multi-wall carbon nanotubes: Efficient and highly reusable catalysts for epoxidation of alkenes with tert-butyl hydroperoxide. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.05.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Wong YL, Tong LH, Dilworth JR, Ng DKP, Lee HK. New dioxo–molybdenum(vi) and –tungsten(vi) complexes with N-capped tripodal N2O2 tetradentate ligands: Synthesis, structures and catalytic activities towards olefin epoxidation. Dalton Trans 2010; 39:4602-11. [DOI: 10.1039/b926864b] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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Tangestaninejad S, Moghadam M, Mirkhani V, Mohammadpoor-Baltork I, Ghani K. Alkene epoxidation catalyzed by molybdenum supported on functionalized MCM-41 containing N–S chelating Schiff base ligand. CATAL COMMUN 2009. [DOI: 10.1016/j.catcom.2008.12.010] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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15
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Barrio L, Campos-Martín JM, de Frutos MP, Fierro JLG. Alkene Epoxidation with Ethylbenzene Hydroperoxides Using Molybdenum Heterogeneous Catalysts. Ind Eng Chem Res 2008. [DOI: 10.1021/ie800262x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Laura Barrio
- Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Cantoblanco, 28049 Madrid, Spain, and Centro de Tecnología Repsol YPF, A-5, Km. 18, 28930 Móstoles, Madrid, Spain
| | - Jose M. Campos-Martín
- Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Cantoblanco, 28049 Madrid, Spain, and Centro de Tecnología Repsol YPF, A-5, Km. 18, 28930 Móstoles, Madrid, Spain
| | - M. Pilar de Frutos
- Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Cantoblanco, 28049 Madrid, Spain, and Centro de Tecnología Repsol YPF, A-5, Km. 18, 28930 Móstoles, Madrid, Spain
| | - Jose L. G. Fierro
- Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Cantoblanco, 28049 Madrid, Spain, and Centro de Tecnología Repsol YPF, A-5, Km. 18, 28930 Móstoles, Madrid, Spain
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Freeman F, Po HN, Ho TS, Wang X. Electrochemical Oxidation of 2-Pyrimidinethiols and Theoretical Study of Their Dimers, Disulfides, Sulfenyl Radicals, and Tautomers. J Phys Chem A 2008; 112:1643-55. [DOI: 10.1021/jp076545y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fillmore Freeman
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025
| | - Henry N. Po
- Department of Chemistry and Biochemistry, California State University, Long Beach, Long Beach, California 90840
| | - Thach S. Ho
- Department of Chemistry and Biochemistry, California State University, Long Beach, Long Beach, California 90840
| | - Ximeng Wang
- Department of Chemistry and Biochemistry, California State University, Long Beach, Long Beach, California 90840
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Martos-Calvente R, de la Peña O'Shea VA, Campos-Martin JM, Fierro JLG. The Usefulness of Density Functional Theory To Describe the Tautomeric Equilibrium of 4,6-Dimethyl-2-mercaptopyrimidine in Solution. J Phys Chem A 2003. [DOI: 10.1021/jp0347015] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Raul Martos-Calvente
- Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain
| | | | | | - Jose L. G. Fierro
- Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain
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