Bis[(1S,1'S)-1,1'-(4-amino-4H-1,2,4-triazole-3,5-di-yl)diethanol-κN]bis-(nitrato-κO)zinc.

In the title homochiral mononuclear compound, [Zn(NO(3))(2)(C(6)H(12)N(4)O(2))(2)], the Zn(II) atom is located on a twofold rotation axis and coordinated by two N atoms from two ligands and two O atoms from two NO(3) (-) anions, adopting a distorted tetra-hedral coordination geometry. The compound is enanti-omerically pure and corresponds to the S diastereoisomer, with the optical activity originating from the chiral ligand. In the crystal, mol-ecules are connected into three-dimensional supra-molecular networks through O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds.