An adduct of (1,10-phenanthroline)-diperchloratobis(pyridine-4-carboxaldehyde oxime-κN1)copper(II) and pyridine-4-carboxaldehyde oxime

In the structure of [Cu(ClO4)(2)(PA)(2)(mu-phen)].PA [PA = pyridine-4-carboxaldehyde oxime or 4-pyridinealdoxime (C6H6N2O) and phen = 1,10-phenanthroline (C12H8N2)], the coordination geometry around the Cu-II atom may be described as a distorted octahedron. Four N atoms, two from a phen ligand and two from PA ligands, occupy the equatorial positions, while two O atoms from two perchlorate groups occupy the axial positions. The PA molecules which are not involved in the Cu-II coordination link the complexes through O-H...N and O-H...O hydrogen bonds, forming layers parallel to the ac plane.