Crystal structure of tris(methylmercurio)sulphonium perchlorate

Abstract

Crystals of [(CH₃Hg)₃S] ClO₄ are tetragonal, space group P4₁ or P4₃, with a= 9.642(3), c=12.808(6)Å, and Z= 4. The structure was solved by three-dimensional Patterson and Fourier syntheses and refined by least squares to R= 0.045 (R′= 0.048) for 1 009 diffractometer data. The [(CH₃Hg)₃S]⁺ cation adopts a trigonal -pyramidal structure with Hg–S and Hg–C bond lengths ranging from 2.383 (10) to 2.405(9)Å, and from 2.04(4) to 2.10(4)Å, respectively. The S–Hg–C angles vary from 172.3(14) to 179.5(12)°, those at the apical sulphur atom from 95.5(3) to 106.5(4)°.