Synthesis and catalytic activity of iron complexes with bidentate NHC ligands.

Wu, Jianguo; Dai, Wei; Farnaby, Joy H; Hazari, Nilay; Le Roy, Jennifer J; Mereacre, Valeriu; Murugesu, Muralee; Powell, Annie K; Takase, Michael K

Wu, Jianguo; Dai, Wei; Farnaby, Joy H; Hazari, Nilay; Le Roy, Jennifer J; Mereacre, Valeriu; Murugesu, Muralee; Powell, Annie K; Takase, Michael K.

Afiliación

Wu J; The Department of Chemistry, Yale University, P. O. Box 208107, New Haven, Connecticut 06520, USA.

Dalton Trans ; 42(20): 7404-13, 2013 May 28.

Article en En | MEDLINE | ID: mdl-23435436

RESUMEN

A family of well-defined Fe(II) 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 Fe(II) 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.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Dalton Trans Asunto de la revista: QUIMICA Año: 2013 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido

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