(Benzoato-κ2O,O')(quinoline-2-carboxylato-κ2N,O)(quinoline-2-carboxylicacid-κ2N,O)copper(II)

The crystal structure of the title compound, [Cu(C10H6NO2)(C7H5O2)(C10H7NO2)], contains copper(II) ions five-coordinated in a distorted trigonal-bipyramidal environment. The equatorial plane is occupied by three O atoms, one from the carboxylate group of the benzoate ion considered as occupying a single coordination site, the other two from two carboxylate groups of the quinaldic acid and quinaldate ligands. The axial positions are occupied by the N atoms of the quinoline ring system. The metal ion lies on a twofold axis that bisects the benzoate ion. The quinaldate and quinaldic acid ligands are equivalent by symmetry, and the carboxylate/carboxyl groups are disordered. The disordered H atom is shared between the carboxylate groups of adjacent quinaldic acid molecules. Such hydrogen bonds delineate zigzag chains that run along the c axis. The structure is very similar to that of the Mn-II analog.