期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 696, 期 17, 页码 2882-2885出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2011.02.012
关键词
Copper; N-Heterocyclic carbene; Imidazole; Donor ability; Lever electronic parameters
资金
- ERC [ERC-StG 208561]
The bonding of (1,4,7-trithiacyclononane)copper(I) to N-methylimidazole and to N,N'-dimethylimidazol-2-ylidene (IMe) as its pseudo-tautomer has been compared by crystallography, spectroscopy, and electrochemical analyses. In the solid state, a shorter Cu-L bond is observed for L = carbene than for L = imidazole, which indicates that electronic effects override potential steric hindrance in this pair of complexes. The oxidation potential difference reveals that the imidazole is a substantially stronger donor than the carbene ligand, and it allowed for estimating the Lever electronic parameter for the carbene ligand, E-IMe = +0.30 V. (C) 2011 Elsevier B.V. All rights reserved.
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