(Alkoxycarbonyl)iridium compounds with N-donor bases and with triphenylphosphine

Abstract

(Alkoxycarbonyl)iridium compounds of type [Irl₂(CO₂R)(CO)L₂] have been prepared by the reaction of K[Ir(CO)₂l₄] with nitrogen bases L and alcohols ROH. The reaction takes place through nucleophilic attack of the alcohols on the intermediate cations [lrl₂(CO)₂L₂]⁺, some of which have been isolated. Other (alkoxycarbonyl)iridium compounds containing triphenylphosphine (Y), [Irl₂(CO₂R)(CO)Y₂] and [Irl(CO₂R)(CO)₂Y]₂ were obtained by the reaction of [Irl(CO)₂(Y₂)] and [lr(CO)₃Y]₂ respectively with iodine and alcohols.