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.