A Double Helix Coordination Polymer Generated from 2-((Pyridin-4-ylmethyl)thio)-5-(quinoline-2-yl)-1,3,4-oxadiazole and AgI Salts

The new ligand 2-((pyridin-4-ylmethyl)thio)-5-(quinoline-2-yl)-1,3,4-oxadiazole (L) and AgClO4 produced a new coordination polymer: [(Ag2L2ClO4)ClO4](n) (1). The complex has been characterized by single-crystal X-ray diffraction, IR, TGA, PXRD, UV and elemental analysis. Compound 1 crystallizes in triclinic system, space group P (1) over bar, with a = 8.4593(5), b = 14.5903(9), c = 15.7908(10) angstrom, alpha = 97.357(5), beta = 99.116(5), gamma = 104.470(5)degrees, V= 1834.43(20) angstrom(3), D-c= 1.91056 g/cm(3), M-r= 1055.38, Z= 2, F(000) = 1048, u = 1.399 mm(-1), the final S= 1.002, R = 0.049 and wR = 0.105. The compound consists of a double helix chain. The neighboring chains interact via two kinds of pi-pi. interactions to form a two-dimensional (2D) sheet. Each sheet interacts with the neighboring sheets via pi-pi interactions to form an extended 3D supramolecular network.