Crystal structure of 2,4-dimethyl-1,2,4-thiadiazolidine-3,5-dithione

Abstract

The crystal structure of the title compound has been determined from X-ray diffractometer data and refined by least squares to R 0·035 (749 reflections). Crystals are monoclinic, P2₁/n, a= 7·812(1), b= 15·276(3), c= 6·271(2)Å, β= 96·41(1)°, Z= 4. The non-hydrogen atom geometry of the planar system has been corrected throughout for thermal motion; the conjugation is extensive throughout the S·CS·N·CS·N part of the ring but not in the N–S bond. Considerable repulsion distorts the geometry of the peripheral sulphur and methyl groups.