NHC ligands versus cyclopentadienyls and phosphines as spectator ligands in organometallic catalysis

被引：399

作者：

Crabtree, RH ^{[1
]}

机构：

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

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2005年 / 690卷 / 24-25期

关键词：

D O I：

10.1016/j.jorganchem.2005.07.099

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

N-heterocyclic carbenes are compared with cyclopentadienyls and phosphines in terms of bonding and reactivity. Synthetic difficulties that currently prevent the general incorporation of NHCs into chelate, pincer and tripod ligand architectures are related to the inability of the NHC to reversibly decoordinate to correct binding 'errors' in the initial kinetic products of NHC complex formation. The strengths and weaknesses of current synthetic approaches, such as Lin's Ag2O transmetallation route, are discussed. Linker dependent reactivity patterns are related to azole ring orientation effects and some aspects of cyclometalation are considered. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：5451 / 5457

页数：7

共 61 条

[1] 1,3-bis(N,N-dialkylamino)imidazolin-2-ylidenes:: Synthesis and reactivity of a new family of stable N-heterocyclic carbenes [J].