Crystal and molecular structure of tetraphenylphosphonium tetrakis-(dimethyldithiophosphinato)praseodymium(III)

Abstract

The title compound crystallises from ethanol in space group Pca2₁, with cell dimensions a= 19.857(15), b= 11.422(5), c= 19.077(12)Å, and Z= 4. The structure was solved by conventional Patterson and Fourier techniques. and refined to R 0.073. The praseodymium is co-ordinated to eight sulphur atoms which have a distorted tetragonal antiprismatic arrangement. Pr–S bond lengths range from 2.888(7) to 3.056(7)(mean 2.976 Å). The praseodymium atoms alone form an almost perfect hexagonal lattice.