SOLVENTO COMPLEXES OF MAIN GROUP-METALS - THE STRUCTURE OF THE DIMETHYL-SULFOXIDE ADDUCT OF INDIUM(III) PERCHLORATE

The title compound is readily obtained as a colourless, crystalline solid by recrystallization of hydrated indium perchlorate from dimethyl sulfoxide. The crystals are rhombohedral, space group R3, a 9·911(3) A, α 73·66(2)°, Z = 1 f.u.; a single-crystal X-ray structure determination at 295 K refined to R 0-039 for 806 ‘observed’ reflections. Unlike many Me2SO complexes, the indium species contains nicely ordered cations, [ln(Me2SO)6]3+. Indium lies on a site of 3 symmetry, with In-0 2·140(3) Å and the angle between the oxygens related by the threefold axis being 94·2(1)°. Two independent perchlorate moieties are disordered about sites of 3 and 3 symmetry. © 1990 ASEG.