One-dimensional Zigzag Chain Composed of HgI2 Unit and 2,5-Bis（4-pyridyl）- 1,3,4-thiadiazole： [HgI2（C12H8N4S）]

1 INTRODUCTION Much interest has been focused on the design and syntheses of supramolecular coordination polymers with novel topologies and structural motifs because of their encouraging potential applications in the fields of nonlinear optics, catalysis and separation, magnetism and molecular recognition1, 2]. In princi- ple, control over the type and topology of the coor- dination polymers can be achieved by careful choice of ligand, metal coordination geometry preference, inorganic cou…

One-dimensional Zigzag Chain Composed of HgI2 Unit and 2,5-Bis(4-pyridyl)-1,3,4-thiadiazole: [HgI2(C12H8N4S)]

The title compound, HgI2(C12H8N4S)], has been synthesized and characterized by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/n with a =14.086(2), b = 6.0365(6), c = 20.286(2) (A), β = 108.818(5)°, V = 1632.7(3) (A)3, Mr = 694.67, Z = 4,Dc. = 2.826 g/cm3,μ - 13.331 mm1, F(000) = 1240, S = 1.108, the final R = 0.0438 and wR =0.0934 for 3085 observed reflections (I ＞ 2σ(I)). The Hg(Ⅱ) atom is coordinated by two 2,5-bis(4-pyridyl)-1,3,4-thiadiazole (L) molecules and two iodine anions in a distorted tetrahedral coordination geometry. Mercury atoms are linked by the organic ligands to form a one-dimensional zigzag chain. It is noteworthy that such 1D zigzag chains are extended into a two-dimensional double layer framework through I…I interactions.