The crystal and molecular structure of the diphenylhydrazone of 1,2,4-trithiolane-3,5-dione

Abstract

Oxidation with hydrogen peroxide of phenyldithiocarbazic acid C₆H₅-NH–NH–CSSH gives stable orange crystals of a substance which by three-dimensional X-ray analysis was identified as the diphenylhydrazone of 1,2,4-trithiolane-3,5-dione. The crystals are monoclinic, a= 34·53, b= 6·07, c= 7·44 Å, β= 107·4°, Z= 4, space group C2/c. In the molecule (C₆H₅-NH–N)₂C₂S₃ a twofold axis of symmetry runs through the sulphur atom in position 4. The trithiolane ring is in a puckered conformation, the dihedral angle CS–SC being 42°.