trans-Diaquabis(pyridazine-3-carboxylato-κ2N2,O)copper(II)

Abstract

In the title compound, [Cu(C5H3N2O2)2(H2O)2], the CuIIion, located on an inversion center, exhibits an octahedral coordination geometry. The equatorial plane is defined by twotrans-relatedN,O-bidentate pyridazine-3-carboxylate ligands and the axial positions are occupied by two water molecules. In the crystal, molecules are connected by O—H...O hydrogen bonds between the water molecules and the noncoordinating carboxylate O atoms, forming layers parallel to thebcplane. The layers are stacked along theaaxis by further O—H...O hydrogen bonds between the water molecules and the coordinating carboxylate O atoms. Weak C—H...O hydrogen bonds are also observed between the pyridazine rings and the water molecules and between the pyridazine rings and the non-coordinating carboxylate O atoms.