Organometallic chemistry of diphosphazanes. Part 7. Platinum(II), palladium-(o), -(I) and -(II) complexes of RN[P(OPh)2]2(R = Me or Ph)

Abstract

The reactions of [MCl₂(cod)](M = Pd or Pt, cod = cycloocta-1,5-diene) with RN[P(OPh)₂]₂[R = Me (L¹) or Ph (L²)] afford the chelate complexes [MCl₂L¹] and [MCl₂L²]. The dinuclear palladium(O) complex, [Pd₂L¹₃] has been synthesized by starting from [Pd₂(dba)₃](dba = dibenzylideneacetone). Redox condensation of [Pd₂(dba)₃] and [PdCl₂(PhCN)₂] in the presence of the diphosphazane ligands gives the dinuclear palladium(I) complexes [Pd₂Cl₂L¹₂] and [Pd₂Cl₂L²₂]. The structures of the complexes have been deduced from ¹H and ³¹P NMR spectroscopic data. Single-crystal X-ray diffraction studies confirm the structures of [Pd₂L¹₃] and [Pd₂Cl₂L²₂].