Synthesis, Structure, and Reactivity of Methylene Bridged Iridium Dinuclear Complexes

摘要

Transition-metal dinuclear complexes have received a great deal of attention because of their interesting cooperative reactivities and novel electronic structures. The unique properties of the "[MCp~*(μ-CH2)]2 (M = Rh, Ir. Cp~* = η~2-CsMe5)" dinuclear unit for transformation of inorganic sulfur compounds has triggered our efforts to explore a new reactivity and transformation reaction of methylene bridged iridium dunuclear complex [IrCp~*(μ-CH2)Cl]2 (1). In this context, we have recently found that dimethylene dichloro complex 1 reacts with sodium metal and gives a highly reactive pentamethylcyclopentadienyl iridium methylene dinuclear complex, [IrCp~*(μ-CH2)]2 (2), containing the multiple bonds between the metal atoms. Herein, we present a hydride cycle promoted by methylene bridged iridium dinuclear complexes including 1 and 2 (Scheme 1)..