title: Bis(1,3,4-thia-diazol-2-yl) disulfide.
abstract: The title compound, C(4)H(2)N(4)S(4), lies about a twofold rotation axis situated at the mid-point of the central S-S bond. Each of two thia-diazole rings is essentially planar, with an rms deviation for the unique thia-diazole ring plane of 0.0019 (7) Å. C-H⋯N hydrogen bonds link adjacent mol-ecules, forming zigzag chains along the c axis. In addition, these chains are connected by inter-molecular S⋯S inter-actions [S⋯S = 3.5153 (11) Å] , forming corrugated sheets, and further fabricate a three-dimensional supra-molecular structure by inter-molecular N⋯S contacts [S⋯N = 3.1941 (17) Å].
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, People's Republic of China .
authors.forename: Pu-Zhou
authors.initials: PZ
authors.lastname: Hu
authors.forename: Yong-Hua
authors.initials: YH
authors.lastname: Zhang
authors.forename: Jian-Ge
authors.initials: JG
authors.lastname: Wang
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Qin
authors.forename: Bang-Tun
authors.initials: BT
authors.lastname: Zhao