期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1981
卷号：78
期号：3
页码：1318-1320
DOI：10.1073/pnas.78.3.1318
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：A new class of coordinately unsaturated polynuclear rhodium and iridium alkyl, benzyl, and aryl derivatives of the form [RM(1,5-cyclooctadiene)]x have been prepared by the reaction of the organolithium reagent with the cyclooctadienemetal chlorides at -78{degrees}C. The x-ray crystal structure of [{micro}-CH3Rh (1,5-cyclooctadiene)]2 is reported. The analogous iridium dimer decomposes by an initial sequence of -hydrogen abstraction and then reductive elimination of hydrogen to give [{micro}-CH2Ir(1,5-cyclooctadiene)]2. Formed in high yield by the decomposition of the ethylrhodium complex was [HRh(C8H11)]4, a tetrahedral cluster with face-bridging hydride ligands. Also discussed are the reactivities of the benzyl and phenyl derivatives. Unique reaction pathways for C--H bond activation and scission in this chemistry are delineated.
关键词：methyl and methylene bridged metal dimers ; x-ray crystallographic study ; C—H bond activation
