Synthesis and chemistry of new complexes of palladium(0) and platinum(0) with chelating phosphine amide ligands. X-ray structure of cis-bis(o-(diphenylphosphino)-N-benzoylanilino)palladium(II)

Article abstract of DOI:10.1021/om00138a004

The compound o-Ph₂PC₆H₄NHC(O)Me has been prepared by the reaction between o-Ph₂PC₆H₄NH₂ and acetyl chloride. The compound has been used to synthesize Pd(dba) (o-Ph₂PC₆H₄NHC(O)Me)₂, PdCl₂(o-Ph₂PC₆H₄NHC(O)Me) ₂, and Pd(o-Ph₂PC₆H₄NC(O)Me)₂ along with their Pt analogues. The zerovalent complexes have one monodentate and one bidentate o-Ph₂PC₆H₄NHC(O)Me ligand. At elevated temperatures the free and complexed N ligands interchange. In chloroform solvent Pt(dba)(o-Ph₂PC₆H₄NHC(O)Me)₂ reacts with H₂ to give trans-PtHCl(o-Ph₂PC₆H₄NHC(O)Me)₂ along with dbaH₂. The corresponding reaction with D₂ gives the platinum deuteride complex. The reaction between Pd₂-(dba)₃dba and o-Ph₂PC₆H₄NHC(O)Ph gives the divalent complex Pd(o-Ph₂PC₆H₄NC(O)Ph)₂. This compound crystallizes in a monoclinic unit cell (P2₁/c) with a = 18.496 (7) ?, b = 16.806 (4) ?, c = 16.490 (5) ?, β = 104.83 (2)°, and Z = 4. The P,N chelate complex has a cis stereochemistry.