Novel iridium complexes of an azine diphosphine: very reactive iridium(I) species formed by a unique isomerisation of an iridium(III) hydride. A new method of creating coordinative unsaturation

Abstract

The coordinatively saturated iridium(III) hydride [[graphic omitted]Ph₂}] containing an ene–hydrazone backbone isomerises reversibly in a polar solvent to give the reactive and coordinatively unsaturated iridium(I) salt [[graphic omitted]Ph₂]Cl which reacts rapidly with alkenes, acetylenes, dihydrogen, etc.