1
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O'Reilly A, Gardiner MG, McMullin CL, Fulton JR, Coles MP. Aluminyl derived ethene functionalization with heteroallenes, leading to an intramolecular ligand rearrangement. Chem Commun (Camb) 2024; 60:881-884. [PMID: 38165276 DOI: 10.1039/d3cc05785b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The aluminacyclopropane K[Al(NON)(η-C2H4)] ([NON]2- = [O(SiMe2NDipp)2]2-, Dipp = 2,6-iPr2C6H3) reacts with CO2 and iPrNCNiPr to afford ring-expanded products of C-C bond formation. The latter system undergoes a 1,3-silyl retro-Brook rearrangement of the NON-group, to afford the [NNO]2- ligand ([NNO]2- = [N(Dipp)SiMe2N(Dipp)SiMe2O]2-). The mechanism of transformation was examined by density functional theory (DFT).
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Affiliation(s)
- Andrea O'Reilly
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6012, New Zealand.
| | - Michael G Gardiner
- Research School of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
| | | | - J Robin Fulton
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6012, New Zealand.
| | - Martyn P Coles
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6012, New Zealand.
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2
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Takegasa S, Lee MM, Tokuhiro K, Nakano R, Yamashita M. Rhodium‐Catalyzed Acrylate Synthesis from Carbon Dioxide and Ethylene by using a Guanidine‐Based Pincer Ligand: Perturbing Occupied d‐Orbitals by pπ‐dπ Repulsion Makes a Difference. Chemistry 2022; 28:e202201870. [DOI: 10.1002/chem.202201870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Shinnosuke Takegasa
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Tokai National Higher Education and Research System Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Ming Min Lee
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Tokai National Higher Education and Research System Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Kei Tokuhiro
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Tokai National Higher Education and Research System Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Ryo Nakano
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Tokai National Higher Education and Research System Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Makoto Yamashita
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Tokai National Higher Education and Research System Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
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Takahashi K, Sakurazawa Y, Iwai A, Iwasawa N. Catalytic Synthesis of a Methylmalonate Salt from Ethylene and Carbon Dioxide through Photoinduced Activation and Photoredox-Catalyzed Reduction of Nickelalactones. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kohei Takahashi
- Department of Chemistry, Tokyo Institute of Technology, O-okayama,
Meguro-ku, Tokyo 152-8551, Japan
| | - Yuji Sakurazawa
- Department of Chemistry, Tokyo Institute of Technology, O-okayama,
Meguro-ku, Tokyo 152-8551, Japan
| | - Asaki Iwai
- Department of Chemistry, Tokyo Institute of Technology, O-okayama,
Meguro-ku, Tokyo 152-8551, Japan
| | - Nobuharu Iwasawa
- Department of Chemistry, Tokyo Institute of Technology, O-okayama,
Meguro-ku, Tokyo 152-8551, Japan
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Takahashi K, Hirataka Y, Ito T, Iwasawa N. Mechanistic Investigations of the Ruthenium-Catalyzed Synthesis of Acrylate Salt from Ethylene and CO 2. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00659] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kohei Takahashi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Yo Hirataka
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Tatsuyoshi Ito
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Nobuharu Iwasawa
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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Gray M, Hines MT, Parsutkar MM, Wahlstrom AJ, Brunelli NA, RajanBabu TV. Mechanism of Cobalt-Catalyzed Heterodimerization of Acrylates and 1,3-Dienes. A Potential Role of Cationic Cobalt(I) Intermediates. ACS Catal 2020; 10:4337-4348. [PMID: 32457820 PMCID: PMC7250405 DOI: 10.1021/acscatal.9b05455] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Coupling reactions of feedstock alkenes are promising, but few of these reactions are practiced industrially. Even though recent advances in the synthetic methodology have led to excellent regio- and enantioselectivies in the dimerization reactions between 1,3-dienes and acrylates, the efficiency as measured by the turnover numbers (TON) in the catalyst has remained modest. Through a combination of reaction progress kinetic analysis (RPKA) of a prototypical dimerization reaction, characterization of isolated low-valent cobalt catalyst precursors involved, several important details of the mechanism of this reaction have emerged. (i) The prototypical reaction has an induction period that requires at least two hours of stir time to generate the competent catalyst. (ii) Reduction of a Co(II) complex to a Co(I) complex, and subsequent generation of a cationic [Co(I)]+ species are responsible for this delay. (iii) Through RPKA using in situ IR spectroscopy, same excess experiments reveal inhibition by the product towards the end of the reaction and no catalyst deactivation is observed as long as diene is present in the medium. The low TON observed is most likely the result of the inherent instability of the putative cationic Co(I)-species that catalyzes the reaction. (iv) Different excess experiments suggest that the reaction is first order in the diene and zero order in the acrylate. (v) Catalyst loading experiments show that the catalyst is first order. The orders in the various regents were further confirmed by Variable Time Normalization Analysis (VTNA). (vi) A mechanism based on oxidative dimerization [via Co(I)/Co(III)-cycle] is proposed. Based on the results of this study, it is possible to increase the TON by a factor of 10 by conducting the reaction at an increased concentration of the starting materials, especially, the diene, which seems to stabilize the catalytic species.
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Affiliation(s)
- Montgomery Gray
- 151 W. Woodruff, Columbus, OH 43210 and the Department of Chemistry and Biochemistry, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - Michael T Hines
- The Ohio State University, William G. Lowrie Department of Chemical and Biomolecular Engineering, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - Mahesh M Parsutkar
- 151 W. Woodruff, Columbus, OH 43210 and the Department of Chemistry and Biochemistry, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - A J Wahlstrom
- The Ohio State University, William G. Lowrie Department of Chemical and Biomolecular Engineering, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - Nicholas A Brunelli
- The Ohio State University, William G. Lowrie Department of Chemical and Biomolecular Engineering, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - T V RajanBabu
- 151 W. Woodruff, Columbus, OH 43210 and the Department of Chemistry and Biochemistry, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
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Takahashi K, Cho K, Iwai A, Ito T, Iwasawa N. Development of N-Phosphinomethyl-Substituted NHC-Nickel(0) Complexes as Robust Catalysts for Acrylate Salt Synthesis from Ethylene and CO 2. Chemistry 2019; 25:13504-13508. [PMID: 31464036 DOI: 10.1002/chem.201903625] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Indexed: 11/11/2022]
Abstract
By using a nickel complex with an N-phosphinomethyl-N-heterocyclic carbene ligand (NHC-P), the reducing ability and thermal stability of the complex were improved considerably compared to the previously reported bipyridine and bisphosphine complexes, and acrylate salt was prepared from ethylene and CO2 with the highest TON ever reported for nickel systems even without using metallic zinc. Oxidative cyclization of ethylene and CO2 on the NHC-P nickel complex was found to proceed very rapidly compared to previous systems.
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Affiliation(s)
- Kohei Takahashi
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Kinryo Cho
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Asaki Iwai
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Tatsuyoshi Ito
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Nobuharu Iwasawa
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
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Iron MA, Janes T. Evaluating Transition Metal Barrier Heights with the Latest Density Functional Theory Exchange-Correlation Functionals: The MOBH35 Benchmark Database. J Phys Chem A 2019; 123:3761-3781. [PMID: 30973722 DOI: 10.1021/acs.jpca.9b01546] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new database of transition metal reaction barrier heights (MOBH35) is presented. Benchmark energies (forward and reverse barriers and reaction energy) are calculated using DLPNO-CCSD(T) extrapolated to the complete basis set limit using a Weizmann-1-like scheme. Using these benchmark energies, the performance of a wide selection of density functional theory (DFT) exchange-correlation functionals, including the latest from the Martin, Truhlar, and Head-Gordon groups, is evaluated. It was found, using the def2-TZVPP basis set, that the ωB97M-V (MAD 1.7 kcal/mol), ωB97M-D3BJ (MAD 1.9 kcal/mol), ωB97X-V (MAD 2.0 kcal/mol), and revTPSS0-D4 (MAD 2.2 kcal/mol) hybrid functionals are recommended. The double-hybrid functionals B2K-PLYP (MAD 1.7 kcal/mol) and revDOD-PBEP86-D4 (MAD 1.8 kcal/mol) also performed well, but this has to be balanced by their increased computational cost.
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Affiliation(s)
- Mark A Iron
- Computational Chemistry Unit, Department of Chemical Research Support , Weizmann Institute of Science , Rehovot , Israel 7610001
| | - Trevor Janes
- Department of Organic Chemistry , Weizmann Institute of Science , Rehovot , Israel 7610001
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