[Co(NHC)(CO)<sub>3</sub>]: Isolation and Reactivity Study of a Model 17-Electron Species in the Oxo Process
書誌事項
- タイトル別名
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- [Co(NHC)(CO)3]: Isolation and Reactivity Study of a Model 17-Electron Species in the Oxo Process
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説明
[Co(L)(CO)3]2 (L = CO or PR3) catalyzed hydroformylation of olefins is among the most successful homogeneous organometallic catalysis. The bimetallic [Co(L)(CO)3]2 complex exists in equilibrium with its mononuclear 17-electron [Co(L)(CO)3] metalloradical. However, isolation of the mononuclear metalloradical is unknown, and hence the role of this species in the catalytic cycle is difficult to study. Herein, we report the isolation of [Co(L)(CO)3] using ring-expanded N-heterocyclic carbene (reNHC) ligands. Isolation of this complex enabled us to examine feasibility of putative termolecular H2 activation by the [Co(L)(CO)3] metalloradicals. The kinetic experiments revealed that [Co(reNHC)(CO)3] does not activate H2 via a previously proposed termolecular mechanism but via a bimolecular mechanism. The result obtained here will contribute to design a cobalt carbonyl complex that activates H2 under mild conditions and to develop a more energy efficient oxo process based on economical cobalt catalysts.
source:https://pubs.acs.org/doi/10.1021/acs.organomet.0c00765
収録刊行物
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- Organometallics
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Organometallics 40 (4), 500-507, 2021-01-08
American Chemical Society
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詳細情報 詳細情報について
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- CRID
- 1050851165488062080
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- NII論文ID
- 120007038890
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- ISSN
- 02767333
- 15206041
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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