Acta Cryst. (2007). E63, m2432-m2433  [ doi:10.1107/S1600536807041797 ]

Poly[bis(₂-5-thioxo-1H-1,2,4-thiadiazole-3-thiolato-²S³:S⁵)zinc(II)]

X.-L. Zhang, N. An, Y.-E. Qiu, C.-L. Zhang and Y.-C. Wang

Abstract: In the crystal structure of the neutral polymeric title compound, [Zn(C₂HN₂S₃)₂]_n, the Zn^II atom is located at a site of 2 symmetry and is coordinated by four S atoms of four symmetry-related 5-thioxo-1H-1,2,4-thiadiazole-3-thiolate ligands in a tetrahedral geometry, with S-Zn distances of 2.3343 (6) and 2.3560 (6) Å, and S-Zn-S angles ranging from 103.78 (3) to 112.572 (17)°. Each of the ligands bridges two Zn^II atoms through two terminal S atoms, leading to the formation of a chiral two-dimensional layer containing homochiral helical chains. However, in the crystal structure, adjacent layers have opposite chirality and are connected into a three-dimensional network by N-HS hydrogen bonds.

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