X-Ray crystal structures of the nickel(II) and copper(II) complexes of O-phospho-DL-threonine–pyridoxal Schiff base

Abstract

X-Ray structural analyses of two metal complexes of O-phospho-DL-threonine–pyridoxal Schiff base, [Ni(C₁₂H₁₅N₂O₈P)(H₂O)₃]·2H₂O (1) and [Cu(C₁₂H₁₅N₂O₈P)(H₂O)]·H₂O (2), show the nickel (II) complex (1) to be a monomer with the octahedral nickel ion bonded to the tridentate Schiff base and three water molecules, and the copper(II) complex (2) to be a dimer with the square-pyramidal copper ion bonded to the tetradentate Schiff base, involving a phosphate oxygen atom from a neighbouring molecule, and one water molecule.