Synthesis and catalytic activity of iron complexes with bidentate NHC ligands

Wu, J., Dai, W., Farnaby, J. H. , Hazari, N., Le Roy, J. J., Mereacre, V., Murugesu, M., Powell, A. K. and Takase, M. K. (2013) Synthesis and catalytic activity of iron complexes with bidentate NHC ligands. Dalton Transactions, 42(20), pp. 7404-7413. (doi: 10.1039/C3DT32551B) (PMID:23435436)

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Abstract

A family of well-defined FeII complexes of the type {BnN(N-CH2(CH2)n-N′-tert-butyl-imidazole-2-ylidene)2}FeCl2 (Bn = benzyl; n = 1 (1) or 2 (2)), {BnN(N-CH2(CH2)n-N′-methylbenzimidazole-2-ylidene)2}FeCl2 (n = 1 (3) or 2 (4)) and {BnN(N-CH2CH2CH2-N′-methylbenzimidazole-2-ylidene)2}FeBr2 (5) has been synthesized. These complexes are rare examples of Fe species supported by bidentate NHC ligands. Complexes 2, 3, 4 and 5 were characterized by X-ray crystallography and in all cases a distorted tetrahedral geometry is observed around the Fe center. The magnetic data is consistent with the complexes containing non interacting high spin FeII centers (S = 2) and indicates that a large zero-field splitting (D) is present. The new complexes are highly active pre-catalysts for the homo-coupling of Grignard reagents.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Farnaby, Dr Joy
Authors: Wu, J., Dai, W., Farnaby, J. H., Hazari, N., Le Roy, J. J., Mereacre, V., Murugesu, M., Powell, A. K., and Takase, M. K.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Dalton Transactions
Publisher:Royal Society of Chemistry
ISSN:1477-9226
ISSN (Online):1477-9234
Published Online:07 February 2013

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