Crystal structure of aqua(1H-pyrazole-κN2)(pyridine-2,6-dicarboxylato-κ3O2,N,O6)copper(II) dihydrate

Abstract

In the title compound, [Cu(C7H3NO4)(C3H4N2)(H2O)]·2H2O, the CuII atom is coordinated by three O atoms and two N atoms, provided by a tridentate pyridine-2,6-dicarboxylate (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 molecule is positioned at the apical position. In the crystal, the complex molecule and the two crystallographically independent non-coordinating water molecules are linked into a supramolecular layer structure parallel to the ab plane via O—H...O and N—H...O hydrogen bonds.

Keywords

• crystal structure
• pyridine-2,6-dicarboxylate
• pyrazole
• square-pyramidal CuII complex