Organoimido complexes of tungsten(IV) containing σ- and π-bound acetylenes. The X-ray crystal structure of diphenylacetylenebis(phenylacetylide)phenylimidobis(trimethylphosphine)tungsten(VI)[W(σ-CCPh)2(NPh)(η2-PhCCPh)(PMe3)2]

Abstract

Reaction of [WCl₂(NPh)(PhCCPh)(PMe₃)₂] with PhCCLi yields [WCl(CCPh)(NPh)(PhCCPh)(PMe₃)₂] and [W(CCPh)₂(NPh)(PhCCPh)(PMe₃)₂]; the structure of the latter complex, established by X-ray crystallography, confirms the simultaneous σ- and πbonding of the acetylenes in the presence of the phenylimido ligand.