SYNTHESIS, SPECTRA AND CRYSTAL-STRUCTURES OF COMPLEXES OF AMBIDENTATEC6H5C(O)C(NO)CN-

Compounds of Ni-II, CUII, Pb-II, Ag-I, T1(I), Sn-IV and Sb-V with the oxime C6H5C(O)C(NOH)CN (HL) were obtained from water, alcohol or aceto nitrile solutions. The copper(II) complexes have been prepared in high yields using metallic copper powder. The compounds were characterized by IRI UV/VIS spectroscopy, magnetochemistry and X-ray analysis. The crystal and molecular structures of [CuL(2)(H2O)] and [CuL(2)-(4-mpy)( 2)] (4-mpy = 4-methylpyridine) have been determined. In both complexes the anions adopt a cis-anti conformation, and the Cu-II is five-co-or dinated. The wide variety of co-ordination modes exhibited by the oxim ate are reviewed and discussed.