Compounds containing platinum-carbon bonds. Part I. Crystal and molecular structure of cis-dichloro[diethyl(phenyl)phosphine](ethyl isocyanide)platinum(II), cis-[PtCl2(CNEt)(PEt2Ph)]

Abstract

The molecular geometry of the title compound has been determined by an X-ray analysis based on 1062 photographic data. The crystals are orthohombic, space-group p2₁2₁2₁, a= 15·16(1), b= 10·72(1), c= 10·48(1)Å, Z= 4. The structure was solved by the heavy-atom method and refined by full-matrix least-squares to R 0·062. The crystals are built of monomeric molecules. Co-ordination around the platinum atom is square planar. The platinum-ligand bond lengths are: Pt–C 1·83(4), Pt–P 2·244(8), Pt-Cl(trans to C) 2·314(10), and Pt–Cl(trans to P) 2·390(8)Å. The trans-influence of isocyanide is thus appreciably smaller than that of tertiary phosphine.