A STRUCTURAL-ANALYSIS OF THE SEMIBRIDGING CARBONYL
A STRUCTURAL-ANALYSIS OF THE SEMIBRIDGING CARBONYL
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DOI：
10.1021/ic00226a016
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发表时间：
1986-03-12
影响因子：
4.6
通讯作者：
LAVIN, M
中科院分区：
文献类型：
--
作者：
CRABTREE, RH;LAVIN, M
The structural data for terminal, linear and bent semibridging, and symmetrically bridging CO groups in 47 compounds are subjected to a detailed quantitative analysis. As first suggested by Cotton, the terminal, bent semibridging, and symmetrical bridging systems form a smooth structural continuumthat can be identified with the terminal-bridge-terminal CO-exchange reaction trajectory. The linear semibridging carbonyls can be divided into three major types on structural and chemical grounds. Type I contains strongly interacting systems, with one linear semibridging CO per dimetal unit. Type II, with more than one such CO bridge and multipleM-M bonding, shows less interaction. Type III systems, containing a transition metal and either Au or a main-group metal have, it is proposed, no significant interaction between the second metal and the ostensibly bridging CO. Type IV is as yet only tentatively formulated as it contains but a single example: Mn2 (CO) 5 (dppm) 2. The current bonding models are discussed with reference to these data, and their validity for the different structural types is considered.
