Five- and six-coordinated cobalt(II), nickel(II), copper(II), and zinc(II) complexes of the pentadentate Schiff base ligands N,N'-bis(2-hydroxy-5-Y-phenyl)phenylmethylene-4-azaheptane-1,7-diamine (Y = Cl or Ch3) and N,N'-bis(5-chloro-2-hydroxyphenyl)phenylmethylene-4-thiaheptane-1,7-diami