Addition of diphenylphosphine to a bis(µ-pyrazolyl)di-iridium(I)complex resulting in h-transfer to co-ordinated cyclo-octa-1,5-diene: X-ray crystal structure of an iridium dimer incorporating unsymmetrical pyrazolyl and phosphido bridging groups and a 1-σ,4-5-η-C8H13ligand

Abstract

Reaction of [Ir(cod)(µ-pz)]₂(cod = cyclo-octa-1,5-diene; pzH = pyrazole)with Ph₂PH results in hydrogenation of cod at one Ir centre to give a 1-σ,4-5-η-C₈H₁₃(i.e. -enyl) unit, affording the complex [Ir(cod)(µ-pz)(µ-PPh₂)₂Ir(C₈H₁₃)] in which Ir–Ir = 2.780 Å and both pz and PPh₂ligands occupy unsymmetrical bridging positions.