Reaction of halfsandwich iridium polychalcogenide complexes with dimethyl acetylenedicarboxylate. Molecular structure of Cp*Ir[S2C2(COOMe)2

Abstract

The pentamethylcyclopentadienyl iridium complexes Cp*Ir(PMe3)(En) (E=S, n=4, 5 or 6; E=Se, n=2 or 4; E=Te, n=2) react with dimethyl acetylenedicarboxylate to give Cp*Ir(PMe3)[E2C2(COOMe)2] compounds which tend to lose the trimethylphosphine ligand; the molecular structure of the dithiolene derivative, Cp*Ir[S2C2(COOMe)2], has been determined.