Crystal structure of aqua-(1-pyrazole-κ)(pyridine-2,6-di-carboxyl-ato-κ,,)copper(II) dihydrate.

In the title compound, [Cu(CHNO)(CHN)(HO)]·2HO, the Cu atom is coordinated by three O atoms and two N atoms, provided by a tridentate pyridine-2,6-di-carboxyl-ate (pdc), one pyrazole and one water ligand, forming a slightly distorted square-pyramidal geometry [range of O-Cu-O and O-Cu-N bond angles = 79.55 (8)-166.22 (10)°]. The water mol-ecule is positioned at the apical position. In the crystal, the complex mol-ecule and the two crystallographically independent non-coordinating water mol-ecules are linked into a supra-molecular layer structure parallel to the plane O-H⋯O and N-H⋯O hydrogen bonds.