Diaquabis[5-(pyrazin-2-yl-kN(1))-3-(pyridin-3-yl)-1,2,4-triazolido-kappa N-1]-zinc

In the title compound, [Zn(C11H7N6)(2)(H2O)(2)], the Zn-II cation, located on an inversion center, is N, N'-chelated by two 5-(pyrazin-2-yl)-3-(pyridin-3-yl)-1,2,4-triazolide anions and is further coordinated by two water molecules in a distorted N4O2 octahedral geometry. In the anionic ligand, the pyrazine and pyridine rings are twisted with respect to the central triazole ring by 5.77 (10) and 11.54 (10)degrees, respectively. In the crystal, classical O-H center dot center dot center dot N and weak C-H center dot center dot center dot O hydrogen bonds and pi-pi stacking interactions between aromatic rings [the centroid-centroid distances between triazole and pyrazine rings, and between triazole and pyridine rings are 3.623 (2) and 3.852 (2) angstrom, respectively] connect the molecules into a three-dimensional supramolecular architecture.