THE CRYSTAL AND MOLECULAR-STRUCTURE AND PROPERTIES OF DIAQUA[N-SALICYLIDENE-(S)-(+)-GLUTAMATO]COPPER(II) MONOHYDRATE

The crystal and molecular structure of the title complex was determined by single crystal X-ray diffraction (R = 0.066 for 1059 observed reflections). The approximately square-pyramidal coordination of Cu(II) results from donor atoms O(12), O(1), N(1), O(5) of one H2O molecule as well as the tridentate Schiff base dianion ligand and from the weakly bonded O(11) donor atom of one other H2O molecule in the apical site. The magnetic behaviour of the complex studied obeys the Curie-Weiss law in the temperature range 94-309 K with a small value of the Weiss constant, theta = 1.4 K. A similar cryomagnetic behaviour is also characteristis for the anhydrous compound, [N-salicylidene-(S)-(+)-glutamato]copper(II), obtained by thermal dehydration of the title complex.