PHOSPHORUS COORDINATION OF DI- AND TRI-AZAPHOSPHOLES IN PLATINUM(0) COMPLEXES: X-RAY MOLECULAR STRUCTURE OF TRIS(TRIPHENYLPHOSPHINE)-1,5-DIMETHYL-1,2,4,3-TRIAZAPHOSPHOLE PLATINUM(0)

Article abstract of DOI:10.1016/S0022-328X(00)99213-1

The azaphospholes and have been used to synthesize the air-sensitive Pt⁰ complexes and (L=L_N, L_C), which are stable towards dissociation in solution at -40 deg C.One representative N> (I) has been the subject of a single-crystal X-ray diffraction study.I is monoclinic, space group P2₁/c, with a 15.680(5), b 13.679(6), c 27.82(2) Angstroem, β 113.86(4)^o; Z=4; R=0.071 for 5492 observed reflections.The flat azaphosphole ligand is ?-P bonded to the metal centre (Pt-P 2.227(4) Angstroem) which completes its pseudo-tetrahedral coordination sphere with the three PPh3 groups (Pt-P_(av) 2.337 Angstroem). 1H and 31P NMR data for the new complexes are discussed.