Chloro(propionyl-C)[2(1H)-pyridonato-N,O]bis[tris(1-methylethyl)phosphine]iridium(III)

The title compound, [IrCl(C₃H₅O)(C₅H₄NO){(C₃H₇)₃P}₂], is a mononuclear complex of a chelated 2(1H)-pyridinone anion, exhibiting a slightly distorted octahedral geometry. The monohapto carbon-bound propionyl ligand and the O atom of the dihapto pyridinonato ligand are mutually trans, and the phosphine ligands tilt away from the propionyl ligand towards the O atom of the heterocyclic ligand. The Ir-O bond length is unusually long for a complex of 2(1H)-pyridinone, a circumstance attributed to the strong trans influence of the acyl ligand.

-1