Disproportionation of nickel(I) bis(triphenylphosphino)bis(trimethylsilyl)amide, (Ph
3P)
2Ni
N(SiMe
3)
2, in the presence of bis(diphenylphosphino)amine, (Ph
2P)
2NH, yields Ni(II) and Ni(0) phosphinoamide complexes: [N(Ph
2P)
2]
2Ni (
1), (Ph
3P)
2Ni[(Ph
2P)
2NH] (
2). Ether solution, containing
2 and Ph
3P (1:2) reacts with dioxygen (one equivalent) to form triphenylphosphinoxide adduct (Ph
3P)
2Ni[(Ph
2P)
2NH
OPPh
3] (
3) in high yield. The crystal structures of compounds
1 and
3 have been determined by X-ray diffraction method.