Structural investigations of nickel complexes. Part II. Crystal and molecular structure of trans-dichlorobis-(4,4-dimethoxy-1-phenylphosphorinan)nickel(II)

Abstract

The structure of the title compound (3) has been elucidated by single-crystal X-ray analysis from photographic data by the heavy-atom method, and refined by full-matrix least-squares calculations to R 0·099 for 3709 independent reflections. Crystals are monoclinic, space group P2₁/c, with Z= 4 in a unit cell of dimensions: a= 10·49(2), b= 12·10(2), c= 23·16(3)Å, β= 90·62(20)°. The nickel atom co-ordination is trans square planar with mean Ni–P and Ni–Cl 2·250(2) and 2·171(2)Å. The phosphorinan ligands are in chair conformations with the phenyl substituent of one ring axial, and that of the other equatorial; the former ring is more flattened at phosphorus.