SYNTHESIS AND X-RAY CRYSTAL-STRUCTURE OF CIS-DICHLORO(CYCLOPENTYLAMINE)(DIMETHYL SULPHOXIDE)PLATINUM(II)

cis-Dichlorocyclopentylamine(dimethyl sulphoxide)platinum(II) is obtai ned, in addition to small quantities of the corresponding trans compou nd, by reaction of K2PtCl4 with cyclopentylamine in DMSO solution, whe re it is formed as the thermodynamically favoured isomer. An X-ray cry stal structure analysis confirms the cis configuration. Coordination a round the metal centre is square planar, and the ligand bond angles at the Pt atom are close to the expected values of 90 and 180 degrees. T he DMSO ligand is S-coordinated to Pt. The Pt-Cl bond lengths, 2.299(2 ) and 2.317(2) Angstrom, are normal for structures of this type, as ar e the Pt-N and Pt-S bond distances, 2.059(5) and 2.191(2) Angstrom, re spectively.