P,N-heterodifunctional ligands by selective Staudinger reaction of beta-substituted vinylazides with (Z)-1,2-bis(diphenylphosphanyl)-ethene and formation of cyclometalled complexes of palladium(II) of these ligands - crystaland molecular structure of a new chiral cyclometallaphosphoraniminophosphane of palladium(II)

Staudinger reactions of the beta-aryl-, heteroaryl- and ferrocenylvinylazid es (2) with (Z)-1,2-bis(diphenylphosphanyl)ethene afford the P,N-ligands (3 ) in good yields. Reaction of 3 with dichlorobis(benzonitrile)palladium(II) leads to the Pd(II) metallacycle derivatives 5. The molecular structure of 5e has been determined by X-ray crystallography. The electrochemical behav ior of this compound is also reported. (C) 2000 Elsevier Science S.A. All r ights reserved.