Crystal structure of cis-dichloro-cis-bis(dimethylsulphoxide)-trans-di- methyltin(IV)

The crystal structure of cis-dichloro-cis-bis(dimethylsulphoxide)-trans- dimethyltin(VI), CHClOS Sn, has been determined by use of three-dimensional equi-inclination Weissenberg X-ray diffraction data with 947 visually estimated reflections. The orthorhombic unit cell, space group P222, has dimensions, a = 13·39(1), b = 15·58(1), c = 6·95(1) Å, with Z = 4. The structure was refined by least-squares methods to a conventional R of 0·12. The tin atom has an octahedral environment with cis-chlorine atoms and -(dimethyl sulphoxide) groups, bonded through the oxygen, and trans-methyl groups. [Sn-Cl, 2·48(1), 2·53(1); Sn-O, 2·32(3), 2·38(3); Sn-C, 2·07(6), 2·08(5) Å, C-Sn-C, 170(2)°]