Diaquabis{5-carboxy-2-[(1H-1,2,4-triazol-1-yl)methyl]-1H-imidazole-4-carboxylato}zinc

Abstract

In the title compound, [Zn(C8H6N5O4)2(H2O)2], the six-coordinate ZnII ion, which is located on an inversion center, has a distorted octahedral configuration. Each 5-carboxy-2-[(1H-1,2,4-triazol-1-yl)methyl]-1H-imidazole-4-carboxylate ligand chelates to the ZnII ion through a triazole N atom and a carboxylate O atom in the equatorial plane. The coordination sphere is completed by two water molecules in axial positions. There is an intramolecular O—H...O hydrogen bond in the ligand. In the crystal, molecules are linked via intermolecular O—H...O, O—H...N and N—H...N hydrogen bonds, forming a three-dimensional structure.