The co-ordination chemistry of 2-(diphenylphosphinoamino)pyridine

Abstract

2-(Diphenylphosphinoamino)pyridine, dppap [Ph₂PNHpy], and over 40 illustrative examples of its complexes have been prepared. Monodentate, bidentate and bridging co-ordination of the neutral (and bidentate deprotonated ligand) has been demonstrated in a range of palladium, platinum and gold complexes. Ten demonstrative examples have been characterised by single crystal X-ray diffraction. Ph₂PNHpy exists as hydrogen-bonded dimer pairs; cis-[PtCl(Ph₂PNHpy-P,N){Ph₂PNHpy-P}]Cl packs in hydrogen-bonded infinite chains; cis-[Pt(Ph₂PNpy-P,N)₂] and cis-[Pd(Ph₂PNpy-P,N)₂] are isomorphous. The structures of cis-[Pd(Ph₂PNHpy-P,N)₂][BF₄]₂, [AuCl(Ph₂PNHpy-P)], [Pt(C₈H₁₂OMe)(Ph₂PNpy-P,N)]·H₂O illustrating hydrogen-bonding, cis-[PtCl(Ph₂PNHpy-P,N)(PMe₃)]Cl, cis-[PtCl(Ph₂PNpy-P,N)(PMe₃)] and cis-[PtCl(Ph₂PNHpy-P,N)(P(OPh)₃)]Cl are also reported.