Complexes of mercury. Part III. X-Ray analysis of dichlorobis-(1,4-thioxan)mercury(II)
Dichlorobis-(1,4-thioxan)mercury(II) crystallises in the orthorhombic system, space group Pn21a, with four molecules of C8H16Cl2HgO2S2 in a cell of dimensions a= 15·31, b= 19·69, c= 4·33 Å. The mercury atom is co-ordinated in a distorted tetrahedral manner by two sulphur atoms at an average distance of 2·57 Å and two chlorine atoms at an average distance of 2·48 Å. The angles S–Hg–S and Cl–Hg–Cl are 115 and 114°, respectively. Each thioxan molecule is in the chair conformation with the S–Hg bond oriented equatorially.