ORGANONICKEL CHEMISTRY. I. THE CRYSTAL AND MOLECULAR STRUCTURES OF Ph3PNi(Ph)(Ph2PCHCOPh) AND cis-Ni(Ph2PCHCOPh)2*0.5C7H8

Article abstract of DOI:10.1016/0022-328X(85)80095-4

Reaction of Ni(Cod)2, Ph3P and Ph3PCHCOPh in toluene affords Ph3PNi(Ph)(Ph2PCHCOPh) (I), but with Ph3As instead of Ph3P, it affords cis-Ni(Ph2PCHOPh)2*0.5tol (II).The crystal and molecular structures have been studied by X-ray diffraction.The crystals of I, are monoclinic, space group Cc, with a 13.549(7), b 13.775(3), c 19.763(6) Angstroem, β 102.34(3) deg, V 3603(2) Angstroem³, Z = 4.The final R factor is 0.070 for 1392 observed reflections.The crystals of II are monoclinic, space group C2/c, with a 27.425(7), b 11.113(2), c 24.534(7) Angstroem; β 108.27(2) deg, V 7100(3) Angstroem³, Z = 8.The final R factor is 0.083 for 1409 observed reflections.The coordinations of the nickel atoms in both structures are square planar, and the bond lengths and bond angles in the five-membered ring indicate a delocalized system.