Research Article: 5-Amino-1,3,4-thia­diazol-2(3H)-one

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Sung Kwon Kang, Nam Sook Cho, Siyoung Jang.


The asymmetric unit of the title compound, C2H3N3OS, contains three independent mol­ecules which are essentially planar, with r.m.s. deviations of 0.011 (2)–0.027 (2) Å from the mean plane defined by the seven non-H atoms. In the crystal, N—H⋯N and N—H⋯O hydrogen bonds link the mol­ecules into a sheet parallel to the (111) plane.

Partial Text

For the structures and reactivity of thia­diazole derivatives, see: Parkanyi et al. (1989 ▶); Cho, Cho et al. (1996 ▶); Cho, Ra et al. (1996 ▶). For the biological activity of thia­diazole derivatives, see: Castro et al. (2008 ▶); Ra, Cho & Cho (1998 ▶); Ra, Cho, Moon & Kang (1998 ▶).