ESR spectroscopic characterisation of a coordinated alkyne radical, and redox-induced vinylidene–alkyne complex isomerisation
作者:Neil G. Connelly、A. Guy Orpen、Anne L. Rieger、Philip H. Rieger、Carolyn J. Scott、Georgina M. Rosair
DOI:10.1039/c39920001293
日期:——
One-electron oxidation of [Cr(CO)2(RC2R)(η-C6Me6)]1 gives paramagnetic [Cr(CO)2(RC2R)(η-C6Me6)]+1+ in which the unpaired electron in highly delocalised onto the alkyne; the radical cation (1+; R = SiMe3) is an intermediate in the oxidative isomerisation of the vinylidene complex [Cr(CO)2CC(SiMe3)2}(η-C6Me6)]2 to [Cr(CO)2(Me3SiC2SiMe3)(η-C6Me6)](1; R = SiMe3).