Hydrovinylation of Olefins Catalyzed by an Iridium Complex via CH Activation
作者:Gaurav Bhalla、Jonas Oxgaard、William A. Goddard、Roy A. Periana
DOI:10.1021/om050614i
日期:2005.11.1
Olefin dimerizations are typically proposed to proceed via a Cossee−Arlman type migratory mechanism involving relatively electron-rich metal hydrides. We provide experimental evidence and theoretical calculations that show, in contrast, relatively electron-poor O-donor Ir complexes can catalyze the dimerization of olefins via a mechanism that involves olefin CH bond activation and insertion into a
Reduction of vinyltrichlorogermane with lithium aluminium hydride yields vinylgermane [b.p. −3·5° (extrap.)], a compound which polymerizes to a white solid in daylight, especially in the presence of mercury. Polymeric vinylgermane commences measurable decomposition above 275°, giving hydrogen with lesser amounts of ethylene and germane. Like polymeric vinylsilane, polyvinylgermane is insoluble in a