Two Novel Crystal Structures of 2-Mercapto-1,3,4-thiadiazole Complexes with Mercury (II) Chloride

Abstract

Two novel complexes 1 and 2 have been simultaneously obtained by the reaction of 2-mercapto-1,3,4-thiadiazole (MTD) with mercury (II) chloride (HgCl2) in CH3CN, and their crystal structures are characterized by single-crystal X-ray diffraction analysis. Crystal structures show that each Hg(II) of 1 is four coordinated with two chloride anions and two exocyclic sulfur atoms of two adjacent MTDs, and each Hg(II) of 2 is three coordinated with one chloride anion, one nitrogen atom and one exocyclic sulfur atom of two adjacent MTDs, respectively. Assisting the intermolecular works such as S···S, S···Cl or Hg···S interactions, both two complexes 1 and 2 are formed 2D supramolecular architectures. The results obtained conform the MTD can exist thiol and thione forms in the solid state. Two complexes 1 and 2 structures of 2-mercapto-1,3,4-thiadiazole (MTD) with mercury (II) chloride were solved by X-ray diffraction analysis respectively.