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Iwasaki T, Yokoyama W, Kambe N. Structure of the Complex Ni(C 8H 12)(L) and Its Reactivity toward Organometallic Reagents. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Takanori Iwasaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Wataru Yokoyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Nobuaki Kambe
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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2
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Luo G, Luo Y, Hou Z, Qu J. Intermetallic Cooperation in Olefin Polymerization Catalyzed by a Binuclear Samarocene Hydride: A Theoretical Study. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Gen Luo
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Yi Luo
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Zhaomin Hou
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, People’s Republic of China
- Organometallic
Chemistry Laboratory and Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Jingping Qu
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, People’s Republic of China
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3
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Yang W, Yi J, Sun WH. Revisiting Benzylidenequinolinylnickel Catalysts through the Electronic Effects on Catalytic Activity by DFT Studies. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500028] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenhong Yang
- Key laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Jun Yi
- Key laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Wen-Hua Sun
- Key laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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4
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Hong X, Holte D, Götz DCG, Baran PS, Houk KN. Mechanism, reactivity, and selectivity of nickel-catalyzed [4 + 4 + 2] cycloadditions of dienes and alkynes. J Org Chem 2014; 79:12177-84. [PMID: 25325891 PMCID: PMC4275152 DOI: 10.1021/jo502219d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
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Density
functional theory (DFT) calculations with B3LYP and M06
functionals elucidated the reactivities of alkynes and Z/E selectivity of cyclodecatriene products in the
Ni-catalyzed [4 + 4 + 2] cycloadditions of dienes and alkynes. The
Ni-mediated oxidative cyclization of butadienes determines the Z/E selectivity. Only the oxidative cyclization
of one s-cis to one s-trans butadiene
is facile and exergonic, leading to the observed 1Z,4Z,8E-cyclodecatriene product.
The same step with two s-cis or s-trans butadienes is either kinetically or thermodynamically unfavorable,
and the 1Z,4E,8E- and 1Z,4Z,8Z-cyclodecatriene isomers are not observed in experiments. In addition,
the competition between the desired cooligomerization and [2 + 2 +
2] cycloadditions of alkynes depends on the coordination of alkynes.
With either electron-deficient alkynes or alkynes with free hydroxyl
groups, the coordination of alkynes is stronger than that of dienes,
and alkyne trimerization prevails. With alkyl-substituted alkynes,
the generation of alkyne-coordinated nickel complex is much less favorable,
and the [4 + 4 + 2] cycloaddition occurs.
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Affiliation(s)
- Xin Hong
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
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5
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Kang X, Luo Y, Zhou G, Wang X, Yu X, Hou Z, Qu J. Theoretical Mechanistic Studies on the trans-1,4-Specific Polymerization of Isoprene Catalyzed by a Cationic La–Al Binuclear Complex. Macromolecules 2014. [DOI: 10.1021/ma500988s] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Xiaohui Kang
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yi Luo
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
| | - Guangli Zhou
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xingbao Wang
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xuerong Yu
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
| | - Zhaomin Hou
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
- RIKEN
Center for Sustainable Resource Science, Organometallic Chemistry
Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Jingping Qu
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, China
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6
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Tobisch S. Metal-Ligand Cooperation in Catalytic Intramolecular Hydroamination: A Computational Study of Iridium-Pyrazolato Cooperative Activation of Aminoalkenes. Chemistry 2012; 18:7248-62. [DOI: 10.1002/chem.201103620] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 02/27/2012] [Indexed: 11/09/2022]
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7
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Tobisch S. Intramolecular Aminoalkene Hydroamination Mediated by a Tethered Bis(ureate)zirconium Complex: Computational Perusal of Various Pathways for Aminoalkene Activation. Inorg Chem 2012; 51:3786-95. [DOI: 10.1021/ic202753m] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sven Tobisch
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews KY16
9ST, United Kingdom
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8
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Holte D, Götz DCG, Baran PS. An approach to mimicking the sesquiterpene cyclase phase by nickel-promoted diene/alkyne cooligomerization. J Org Chem 2012; 77:825-42. [PMID: 22229741 DOI: 10.1021/jo202314a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Artificially mimicking the cyclase phase of terpene biosynthesis inspires the invention of new methodologies, since working with carbogenic frameworks containing minimal functionality limits the chemist's toolbox of synthetic strategies. For example, the construction of terpene skeletons from five-carbon building blocks would be an exciting pathway to mimic in the laboratory. Nature oligomerizes, cyclizes, and then oxidizes γ,γ-dimethylallyl pyrophosphate (DMAPP) and isopentenyl pyrophosphate (IPP) to all of the known terpenes. Starting from isoprene, the goal of this work was to mimic Nature's approach for rapidly building molecular complexity. In principle, the controlled oligomerization of isoprene would drastically simplify the synthesis of terpenes used in the medicine, perfumery, flavor, and materials industries. This article delineates our extensive efforts to cooligomerize isoprene or butadiene with alkynes in a controlled fashion by zerovalent nickel catalysis building off the classic studies by Wilke and co-workers.
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Affiliation(s)
- Dane Holte
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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9
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Perrin L, Bonnet F, Chenal T, Visseaux M, Maron L. A Joint Experimental/Theoretical Investigation of the Statistical Olefin/Conjugated Diene Copolymerization Catalyzed by a Hemi-Lanthanidocene [(Cp*)(BH4)LnR]. Chemistry 2010; 16:11376-85. [DOI: 10.1002/chem.200903455] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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TSIPIS CONSTANTINOSA. ADVENTURES OF QUANTUM CHEMISTRY IN THE REALM OF INORGANIC CHEMISTRY. COMMENT INORG CHEM 2010. [DOI: 10.1080/02603590490486680] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Tobisch S. Mechanistic Exploration of Intramolecular Aminodiene Hydroamination/Cyclisation Mediated by Constrained Geometry Organoactinide Complexes: A DFT Study. Chemistry 2010; 16:3441-58. [DOI: 10.1002/chem.200902356] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Tobisch S. Is an MN σ-Bond Insertion Route a Viable Alternative to the MN [2+2] Cycloaddition Route in Intramolecular Aminoallene Hydroamination/Cyclisation Catalysed by Neutral Zirconium Bis(amido) Complexes? A Computational Mechanistic Study. Chemistry 2008; 14:8590-602. [DOI: 10.1002/chem.200800750] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Makedonas C, Mitsopoulou CA. Introduction of Modified Electronic Parameters – Searching for a Unified Ligand Properties Scale through the Electrophilicity Index Concept. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700185] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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14
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Graham DC, Cavell KJ, Yates BF. The influence of N-substitution on the reductive elimination behaviour of hydrocarbyl–palladium–carbene complexes—a DFT study. Dalton Trans 2006:1768-75. [PMID: 16568186 DOI: 10.1039/b512681a] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reductive elimination of 2-hydrocarbyl-imidazolium salts from hydrocarbyl-palladium complexes bearing N-heterocyclic carbene (NHC) ligands represents an important deactivation route for catalysts of this type. We have explored the influence that carbene N-substituents have on both the activation energy and the overall thermodynamics of the reductive elimination reaction using density functional theory (DFT). Given the proximity of the N-substituent to the three-centred transition structure, steric bulk has little influence on the activation barrier and it is electronic factors that dominate the barriers' magnitude. Increased electron donation from the departing NHC ligand acts to stabilise the associated complex against reductive elimination, with stability following the trend: Cl < H < Ph < Me < Cy < iPr < neopentyl < tBu. The intimate involvement of the carbene p pi-orbital in determining the barrier to reductive elimination means N-substituents that are capable of removing pi-density (e.g. phenyl) act to promote a more facile reductive elimination.
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Affiliation(s)
- David C Graham
- School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
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15
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Shao LX, Shi M. Facile synthesis of multisubstituted buta-1,3-dienes via Suzuki-Miyaura and Kumada cross-coupling strategy of 2,4-diiodo-buta-1-enes with arylboronic acids and Grignard reagents. Org Biomol Chem 2005; 3:1828-31. [PMID: 15889162 DOI: 10.1039/b504071j] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-pot Suzuki-Miyaura-type and Kumada-type cross-coupling reactions of 2,4-diiodo-buta-1-enes with arylboronic acids and alkyl/aryl magnesium bromides were carried out in the presence of accessibly simple catalysts under mild conditions. As a result, some 1,1,2-trisubstituted buta-1,3-dienes were obtained including the Tamoxifen-type, which have potential adjuvant therapy in women who have suffered from breast cancer and cyclooxygenase-2-type (COX-2-type) inhibitors, some of which have been proved to elicit efficient anti-inflammatory analgesic activities and less adverse gastrointestinal side effects and to be very useful in the prophylactic treatment of a wide variety of cancers and neurodegenerative disorders.
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Affiliation(s)
- Li-Xiong Shao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Fenglin Lu, Shanghai, China
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16
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Balcells D, Maseras F, Ujaque G. Computational Rationalization of the Dependence of the Enantioselectivity on the Nature of the Catalyst in the Vanadium-Catalyzed Oxidation of Sulfides by Hydrogen Peroxide. J Am Chem Soc 2005; 127:3624-34. [PMID: 15755184 DOI: 10.1021/ja0435384] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A computational study with the IMOMM(Becke3LYP:MM3) method is carried out on the mechanism of the enantioselective reaction of complex V(O)(L)(OOH), L= bulky tridentate Schiff base, and bis(tert-butyl) disulfide. The reaction with a given L ligand A is first systematically studied: different conformers of the catalyst are optimized, and the large number of associated transition states are systematically searched. The study is then extended to the geometry optimization of selected transition states associated to other ligands B, C, and D, similar to A but differing in the nature of certain substituents R1, R2, R3. The experimental trends in selectivity for catalysts based on ligands A to D are faithfully reproduced by the calculations. Analysis of the computational results leads finally to the formulation of a simple model that can explain one of the most remarkable aspect of this reaction, namely the large effect on enantioselectivity of ligands seemingly far from each other in the catalyst.
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Affiliation(s)
- David Balcells
- Institute of Chemical Research of Catalonia (ICIQ), 43007 Tarragona, Catalonia, Spain
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17
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Drudis-Solé G, Ujaque G, Maseras F, Lledós A. A QM/MM Study of the Asymmetric Dihydroxylation of Terminal Aliphaticn-Alkenes with OsO4⋅(DHQD)2PYDZ: Enantioselectivity as a Function of Chain Length. Chemistry 2004; 11:1017-29. [PMID: 15614871 DOI: 10.1002/chem.200400201] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The dihydroxylation of terminal aliphatic n-alkenes catalyzed by OsO4(DHQD)2PYDZ ((DHQD)2PYDZ=bis(dihydroquinidine)pyridazine) has been computationally studied by the hybrid QM/MM IMOMM(Becke3LYP:MM3) method. The cases of propene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene have been considered. A systematic treatment for the large number of possible conformations of the longer chain alkenes has been defined and applied, leading to the selection of approximately 1700 conformations to be computed. The IMOMM calculations of the transition states formed between these conformations and the catalyst generate enantiomeric excesses that closely resemble the experimental data of related systems, specifically in the preference for the R isomer and in its dependence on the chain length of the substrate. The selectivity increases sharply with the elongation of the short-chain alkenes until a ceiling value is reached, with further elongations having little effect on the enantiomeric excess (ee). These results are rationalized through the partitioning of the total energy of selected conformers, a process that leads to the identification of the most relevant regions of the catalyst and the characterization of the interactions critical for selectivity.
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Affiliation(s)
- Galí Drudis-Solé
- Unitat de Química Física, Departament de Química, Edifici Cn, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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18
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Dimerisation of butadiene catalyzed by nickel–tris[(1H,1H,2H,2H-perfluorodecyl)phenyl]phosphites complexes in fluorocarbon–hydrocarbon biphasic medium. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.09.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Tobisch S, Werner H. [RhIL]-catalyzed cyclotetramerization of 1,3-butadiene: a theoretical investigation of alternative mechanistic paths for the generation of the [RhIII(octadienediyl)(PR3)]+ complex. Dalton Trans 2004:2963-8. [PMID: 15349174 DOI: 10.1039/b409532d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed theoretical investigation of alternative mechanistic paths for the formation of the [Rh(III)(octadienediyl)(PiPr3)]+ complex is presented, employing a gradient-corrected density functional theory (DFT) method (BP86). This process represents most likely the first step in the recently reported [Rh(I)L]-catalyzed cyclotetramerization of butadiene (M. Bosch, M. S. Brookhart, K. Ilg and H. Werner, Angew. Chem., Int. Ed., 2000, 39, 2304). The favorable route for oxidative addition under C-C-bond formation starts from the prevalent [Rh(I)(butadiene)2(PiPr3)]+ form of the active catalyst through oxidative coupling between two cis-eta4-butadienes. This affords the [Rh(III)(bis-eta3-anti-octadienediyl)(PiPr3)]+ compound as the kinetic coupling product that consecutively undergoes transformation into the thermodynamically favorable bis-eta3-syn-octadienediyl-Rh(III) isomer via facile allylic conversions occurring in the octadienediyl framework. The computationally predicted energy profile is almost in quantitative agreement with the experimentally determined kinetics and allows a consistent rationalization of the experimental observations.
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Affiliation(s)
- Sven Tobisch
- Institut für Anorganische Chemie der Martin-Luther-Universität Halle-Wittenberg, Fachbereich Chemie, Kurt-Mothes-Strasse 2, D-06120, Halle, Germany.
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20
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Applications of Hybrid DFT/Molecular Mechanics to Homogeneous Catalysis. PRINCIPLES AND APPLICATIONS OF DENSITY FUNCTIONAL THEORY IN INORGANIC CHEMISTRY I 2004. [DOI: 10.1007/b97938] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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21
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Tobisch S. [Ni0]-Catalyzed Co-oligomerization of 1,3-Butadiene and Ethylene: A Theoretical Mechanistic Investigation of Competing Routes for Generation of Linear and Cyclic C10-Olefins. J Am Chem Soc 2003; 126:259-72. [PMID: 14709091 DOI: 10.1021/ja0388865] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A detailed theoretical investigation of the mechanism for the [Ni(0)]-catalyzed co-oligomerization of 1,3-butadiene and ethylene to afford linear and cyclic C(10)-olefins is presented. Crucial elementary processes have been carefully explored for a tentative catalytic cycle, employing a gradient-corrected density functional theory (DFT) method. The favorable route for oxidative coupling starts from the prevalent [Ni(0)(eta(2)-butadiene)(2)(ethylene)] form of the active catalyst through oxidative coupling between the two eta(2)-butadienes. The initial eta(3),eta(1)(C(1))-octadienediyl-Ni(II) product is the active precursor for ethylene insertion, which preferably takes place into the syn-eta(3)-allyl-Ni(II) bond of the prevalent eta(3)-syn,eta(1)(C(1)),Delta-cis isomer. The insertion is driven by a strong thermodynamic force, giving rise entirely to eta(3),eta(1),Delta-trans-decatrienyl-Ni(II) forms, with the eta(3)-anti,eta(1),Delta-trans isomer almost exclusively generated. Occurrence of allyl,eta(1),Delta-cis isomers, however, is precluded on both kinetic and thermodynamic grounds, thereby rationalizing the observation that cis-DT and cis,cis-CDD are never formed. Linear and cyclic C(10)-olefins are generated in a highly stereoselective fashion, with trans-DT and cis,trans-CDD as the only isomers, along competing routes of stepwise transition-metal-assisted H-transfer (DT) and reductive CC elimination under ring closure (CDD), respectively, that start from the prevalent eta(3)-anti,eta(1),Delta-trans-decatrienyl-Ni(II) species. The role of allylic conversion in the octadienediyl-Ni(II) and decatrienyl-Ni(II) complexes has been analyzed. As a result of the detailed exploration of all important elementary steps, a theoretically verified, refined catalytic cycle is proposed and the regulation of the selectivity for formation of linear and cyclic C(10)-olefins is elucidated.
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Affiliation(s)
- Sven Tobisch
- Institut für Anorganische Chemie der Martin-Luther-Universität Halle-Wittenberg, Fachbereich Chemie, Kurt-Mothes-Strasse 2, D-06120 Halle, Germany.
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22
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Theoretical exploration of structure–reactivity relationships in organometallic chemistry: butadiene insertion into the organyltransition-metal bond and conversion of the allyltransition-metal fragment in the [NiII(η5-Cp)(η1-phenyl)(η2-butadiene)] complex. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00596-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Balcells D, Maseras F, Lledós A. Density functional study on the mechanism of the vanadium-catalyzed oxidation of sulfides by hydrogen peroxide. J Org Chem 2003; 68:4265-74. [PMID: 12762725 DOI: 10.1021/jo034052t] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A computational study with the Becke3LYP method is carried out on the mechanism of the reaction of complexes V(O)(L)(OOH) and V(O)(LH)(OO) (L = O(CH)(3)N(CH(2))(2)O) with CH(3)S-SCH(3), a system that stands as a model for experimental systems where the metal complex contains larger chelating Schiff bases and the substrate is bis(tert-butyl) disulfide. The different possible isomers of both the hydroperoxo V(O)(L)(OOH) and the peroxo V(O)(LH)(OO) forms of the catalyst are explored, and the reactivity of the most stable among them with the dimethyl disulfide substrate is studied through location of the corresponding transition states. A large variety of reactive paths happen to exist, though in all cases the reaction takes place through a direct transfer process, with the simultaneous formation of the S-O bond and breaking of the O-O bond being the rate-limiting step.
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Affiliation(s)
- David Balcells
- Unitat de Química Física, Edifici Cn, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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