Acta Cryst. (2004). E60, m1481-m1483 [ doi:10.1107/S1600536804023025 ]
Abstract: In the structure of the title compound, [Zn(C5H3N2O2)2(H2O)2], the ZnII ion is located on a centre of symmetry. The coordination around the ZnII atom is slightly distorted octahedral, with two equatorial pyridazine-3-carboxylate ligands in a trans arrangement. A pyridazine-ring N atom [Zn-N = 2.0742 (15) Å] and one carboxylate O atom [Zn1-O2 = 2.0744 (14) Å] from each ligand coordinate to the metal. Two water O atoms [Zn-O = 2.1934 (17) Å] are coordinated in axial positions. The coordinated water molecules act as hydrogen-bond donors to the unbonded carboxylate O atoms in adjacent monomers, forming a three-dimensional network.
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