Crystal and molecular structure of the low-spin five-co-ordinate complex chloro[tris-(2-diphenylphosphinoethyl)amine]nickel(II) hexafluorophosphate

Abstract

The structure of the low-spin five-co-ordinate title complex (I) has been determined by Patterson and Fourier methods, from photographic X-ray data and refined by least-squares techniques to R 0·093 for 2373 observations. Crystals are monoclinic, space group P2₁/c, and Z= 4 in a unit cell of dimensions: a= 16·741(26), b= 14·116(16), c= 16·945(17)Å, β= 98·55(8)°. The co-ordination geometry is essentially trigonal bipyramidal with the phosphorus atoms of the ligand in the equatorial plane (Ni–P 2·194–2·298 Å), and the chlorine and nitrogen atoms in the apical positions [Ni–Cl 2·169(4), Ni–N 1·965(10)Å].