Diaquabis(dicyanamido)bis[4-(2-pyridyl)-4H-1,2,4-triazole-κN1]cobalt(II)

The title complex, [Co(C2N3)(2)(C7H6N4)(2)(H2O)(2)] or [Co(dca)(2)(pytrz)(2)(H2O)(2)], where pytrz is 4-( 2- pyridyl)-4H-1,2,4- triazole and dca is the dicyanamide monoanion, was prepared using pytrz, Na(dca) and CoCl2 center dot 6H(2)O. The Co-II atom lies on a center of inversion and is coordinated in a slightly distorted octahderal geometry by two pytrz ligands, two dca ligands and two trans-oriented water molecules. In the crystal structure, complex molecules are linked by O-H center dot center dot center dot N hydrogen bonds into a two-dimensional network and further into a three-dimensional network via weak C-H center dot center dot center dot N hydrogen bonds.