Synthesis and Spectroscopic Characterization of Copper(Ⅱ), Nickel(Ⅱ) AND COBALT(Ⅱ) COMPLEXES OF (3,3',4,4f)-4,4--(1,4-Phenylenebis(Azan-1-Yl-1-Ylidene)) Bis(3-(Hydroxyimino)Pentan-2-One)

摘要

Copper(Ⅱ), nicke(Ⅱ) and cobalt(Ⅱ) complexes of of (3,3',4,4')-4,4'-(l,4-phenylenebis(azan-l-yl-l-ylidene))bis(3-(hydroxyimino)pentan-2-one) have been prepared by direct and template methods. The ligand and its complexes have been characterized by elemental analyses, spectroscopic technique as IR, UV. Vis., ESR, magnetic moment and conductivity measurements. The molar conductivity values of the complexes in DMF are commensurate with their non-electrolytic nature. The spectral data showed that the ligand act as neutral tetradentate or dibasic tetradentate ligand bonded to the metal ions throughall C=N and protonated or deprotonated C=N-0 groups forming octahedral geometry around the metal ions. The ESR spectra of copper(Ⅱ) complexes (9), (10) and (13) show g||-values (2.274, 2.282, 2.256) which commensurate with considerable covalent bond character with a d_(x2-y2) ground state.