Crystal structure of bis(NN-diethyldithiocarbamato)mercury(II)

Abstract

The crystal structure of the title compound, has been determined by single crystalX-ray diffraction by conventional heavy-atom methods. The structure was refined by block-diagonal least-squares procedures to a final R of 0·12 for 810 visually estimated reflections. Crystals are monoclinic, P2₁/a, a= 11·861 (8), b= 15·02(1), c= 4·751 (4)Å, β= 106·30(6)°, Z= 2. The centrosymmetric mercury atoms have three pairs of sulphur contacts in a highly distorted array, one pair close [Hg–S 2·397(6)Å], and the others arising out of a sharing of the second sulphur between adjacent mercury atoms [Hg–S 2·990(7), Hg–S′ 3·307(7)Å] yielding a helical quasi-polymeric array. The asymmetric co-ordination of the ligand is reflected in associated distortion of the CS₂ geometry [C–S, 1·69(2) 1·76(2)Å, S–C–S 120(1)°]. The remainder of the ligand geometry is normal.