Acta Cryst. (2011). E67, m816-m817  [ doi:10.1107/S160053681101974X ]

Iodido{4-phenyl-1-[1-(1,3-thiazol-2-yl-N)ethylidene]thiosemicarbazidato-²N',S}{4-phenyl-1-[1-(1,3-thiazol-2-yl)ethylidene]thiosemicarbazide-S}mercury(II)

S. S. R. Dasary, S. R. Arumugam, H. Yu, R. Venkatraman and F. R. Fronczek

Abstract: In the title compound, [Hg(C₁₂H₁₁N₄S₂)I(C₁₂H₁₂N₄S₂)], the Hg atom is in a distorted square-pyramidal coordination, defined by the iodide ligand, by the S atom of the neutral ligand in the apical position, and by the N atom of the thiazole ring, the thioureido N and the S atom of the deprotonated ligand. The deprotonated ligand intramolecularly hydrogen bonds to the thiazole ring N atom, while the deprotonated ligand forms an intermolecular hydrogen bond to the thiolate S atom. The deprotonation of the tridentate ligand and its coordination to Hg via the S atom strikingly affects the C-S bond lengths. In the free ligand, the C-S bond distance is 1.685 (7) Å, whereas it is 1.749 (7) Å in the deprotonated ligand. Similarly, the Hg-S bond distance is slightly longer to the neutral ligand [2.6682 (18) Å] than to the deprotonated ligand [2.5202 (19) Å]. The Hg-I distance is 2.7505 (8) Å.

Online 28 May 2011

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