Crystal and molecular structure of cis-(hydroxydiphenylgermyl)phenyl-bis(triethylphosphine)platinum(II)

Abstract

The crystal structure of the title compound was determined from diffractometer measurements (Cu-K_α radiation, R = 0·04). Unit-cell dimensions are a= 18·621 ± 0·01, b= 15·146 ± 0·01, c= 11·245 ± 0·008 Å, space group Pnma, with Z= 4. The molecule contains a germanium–platinum bond of length 2·433 Å, without bridging. The four bonds from platinum are planar with some distortion from a square arrangement. The bonds from germanium and phosphorus are disposed tetrahedrally. The plane of the platinum bonds is a plane of symmetry of the whole molecule. In addition to the germanium, phosphorus, and oxygen (hydroxy) atoms, this plane contains several carbon atoms of the attached organic groups. The compound, originally formulated as (Et₃P)₂(OH)PtGePh₃ is produced from triphenylgermyl-lithium and di-iodobis(triethylphosphine)platinum(II) in a reaction which involves migration of a phenyl group from one metal atom to another.