5-Ethoxy-1,3,4-thiadiazole-2(3H)-thione

Abstract

In the title compound, C4H6N2OS2, the dihedral angle between the five-membered heterocyclic ring and the plane of the ethoxy group is 4.9 (2)°. The 1,3,4-thiadiazole-2-thione unit is planar, with an r.m.s. deviation of 0.011 Å from the corresponding squares plane defined by the seven constituent atoms. In the crystal, pairs of N—H...S hydrogen bonds link the molecules into inversion dimers.