Cp* Chemistry of main-group elements

被引:105
作者
Jutzi, P [1 ]
Reumann, G [1 ]
机构
[1] Univ Bielefeld, Fak Chem, D-33615 Bielefeld, Germany
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 2000年 / 14期
关键词
D O I
10.1039/b001365j
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
In the chemistry of main-group elements the pentamethylcyclopentadienyl (Cp*) group represents a very important substituent. Owing to its quite variable bonding modes, ranging from mainly ionic to mainly covalent and from eta(5) via eta(2/3) to eta(1), an effective adjustment to the electronic situation at the respective element centre is feasible. Furthermore, the steric requirements of the sigma- or pi-bound Cp* group enable the kinetic stabilization of otherwise highly reactive species. Covalent Cp*-element bonds are comparatively weak, consequently allowing fast sigmatropic and haptotropic rearrangement processes. A further consequence is that the Cp* radical as well as the Cp*(-) anion are potential leaving groups. This phenomenon forms the basis of a rich faceted substitution and elimination chemistry. As proof of this statement, several examples from phosphorus, silicon, and gallium chemistry are presented.
引用
收藏
页码:2237 / 2244
页数:8
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