Synthesis and crystal structure of a cadmium coordination polymer with dicyanamide and 1,2-bis(1,2,4-triazol-1-yl)ethane

The new cadmium(II) coordination polymer [Cd(bte)(2)(dca)(2)](n) 1(bte = 1,2-bis(1,2,4triazol-1-yl)ethane, dca = dicyanamide) was synthesized and characterized by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P2(1/n) with a = 8.7148(15), b = 8.6142(17), c = 15.204(3) angstrom, beta= 92.100(10)degrees, V= 1140.6(4) angstrom(3), Z= 2, M-r = 572.87, D-c= 1.668 g/cm(3), F(000) = 572,,mu = 1.004 mm(-1), the final R = 0.0654 and wR = 0.1429 for 1737 observed reflections (I > 2 sigma(I)). The cadmium atom is coordinated equatorially by four nitrogen atoms from four bte ligands and axially by two nitrogen atoms from two dca anions to adopt a distorted octahedral geometry. Each bte molecule bridges two cadmium(II) atoms. Two strands of bte molecules are wrapped around each other, and held together by cadmium(II) atoms. 1 Forms a double chain structure containing eighteen-membered Cd-2(bte)(2) rings.