期刊
COORDINATION CHEMISTRY REVIEWS
卷 200, 期 -, 页码 831-873出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0010-8545(00)00322-2
关键词
metal-arene coordination; donor-acceptor complex; charge-transfer bonding; electrophilic-nucleophilic umpolung; C-H bond activation; X-ray structures
X-ray crystallographic structures of donor-acceptor complexes of aromatic hydrocarbons with transition metals are re-examined with the focus on the arene ligands. Thus, significant structural and electronic changes are revealed in the arene moiety due to coordination to the metal center including: (i) expansion of the aromatic six-carbon ring; (ii) endocyclic pi-bond localization; (iii) distortion of the planarity (folding) of the arene ring; and (iv) shortening of the metal-arene bond distances. All structural features are characteristic of metal-arene (pi- or sigma-) complexes that exhibit various degrees of (metal-to-ligand) charge transfer. The concept of charge-transfer bonding not only explains the structural details but also the various facets of chemical reactivity of metal-coordinated arenes including efficient carbon-hydrogen bond activation and nucleophilic-electrophilic umpolung, both of which are critical factors in homogeneous metal catalysis. (C) 2000 Elsevier Science S.A. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据