Four-co-ordinate iridium(I) cations and the ligand dependence of oxygen uptake: the crystal structure of [Ir(PPh2CH3)4]BF4

Abstract

Four-co-ordinate iridium(I) cations containing various combinations of the ligands, CO, MeCN, Me2SO, PPh3, PPh2Me, and PPh2Et are described including an X-ray structural analysis of [Ir(PPh2Me)4]BF4: the ability of these cations to co-ordinate oxygen is found to be sensitive to steric factors.