2-Substituted propyl-iridium(III) complexes of the type [IrCl2(CH2-CHXCH3)(CO)L2]

Abstract

σ-Allyl complexes of the type [IrCl₂(CH₂CH:CH₂)(CO)L₂] react with HCl readily to give the 2-chloropropyliridium complexes [IrCl₂(CH₂CHXCH₃)(CO)L₂](X = Cl). These are readily converted into the 2-methoxy- or 2-ethoxyderivatives (X = OMe or OEt) when treated with methanol or ethanol, to the 2-hydroxy-complex (L = PMe₂Ph, with sodium carbonate in aqueous acetone) or to the 2-acetoxy complex (with sodium acetate). mer-[IrCl₃-(PEt₂Ph)₃] when treated with potassium hydroxide in allyl alcohol and then with dilute hydrochloric acid and methanol gives a mixture of [IrCl₂(CH₂CHXCH₃)(CO)(PEt₂Ph)₂] with X = OCH₂CH:CH₂ and OMe. I.r. and ¹H n.m.r. data are given. The ¹H n.m.r. spectrum of [IrCl₂(CH₂CHOHCH₃)(CO)(PMe₂Ph)₂] was analysed in the presence of the ‘shift reagent’[Eu(fod)₃].