Synthesis and catalytic activity of iron complexes with bidentate NHC ligands

被引：34

作者：

Wu, Jianguo ^{[1
]}

Dai, Wei ^{[1
]}

Farnaby, Joy H. ^{[1
]}

Hazari, Nilay ^{[1
]}

Le Roy, Jennifer J. ^{[2
]}

Mereacre, Valeriu ^{[3
]}

Murugesu, Muralee ^{[2
]}

Powell, Annie K. ^{[3
]}

Takase, Michael K. ^{[1
]}

机构：

[1] Yale Univ, Dept Chem, New Haven, CT 06520 USA

[2] Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada

[3] Karlsruhe Inst Technol, Inst Inorgan Chem, D-76131 Karlsruhe, Germany

来源：

DALTON TRANSACTIONS | 2013年 / 42卷 / 20期

关键词：

HETEROCYCLIC CARBENE LIGANDS; ARYL GRIGNARD-REAGENTS; DICARBENE COMPLEXES; REACTIVITY; CRYSTAL; HALIDES; COBALT; HYDROSILYLATION; PHOSPHINE; MANGANESE;

D O I：

10.1039/c3dt32551b

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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.

引用

页码：7404 / 7413

页数：10

共 58 条

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