期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 20, 页码 5152-5155出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201311099
关键词
carbon dioxide; catalysis; electrochemistry; manganese; N-heterocyclic carbenes
资金
- National Science Foundation (NSF) [CHE-1054286]
- DOD-MURI program under AFOSR [FA9550-10-1-057]
- NSF [CHE-1308652]
- NSF
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1308652] Funding Source: National Science Foundation
The synthesis and characterization of the first catalytic manganese N-heterocyclic carbene complexes are reported: MnBr(N-methyl-N-2-pyridylbenzimidazol-2-ylidine)(CO)(3) and MnBr(N-methyl-N-2-pyridylimidazol-2-ylidine)(CO)(3). Both new species mediate the reduction of CO2 to CO following two-electron reduction of the Mn-I center, as observed with preparative scale electrolysis and verified with (CO2)-C-13. The two-electron reduction of these species occurs at a single potential, rather than in two sequential steps separated by hundreds of millivolts, as is the case for previously reported MnBr(2,2-bipyridine)(CO)(3). Catalytic current enhancement is observed at voltages similar to MnBr(2,2-bipyridine)(CO)(3).
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