Synthesis and Characterization of Schiff Base with Bivalence Transition Metal Complexes Namely Cu, Co, Ni, Mn and Fe
A series of metal complexes have been synthesized by the reaction of Schiff base with metal (II) salt solution. The complexes were characterized by UV and FT- IR studies. The study reveals that the geometry of the complexes were octahedral. The electronic spectra of these complexes show a strong absorption band in 550 - 580nm region. This confirms the coordination of ligand with metal. The FT-IR shows a very strong band at 1616cm-1 assigned to C=N stretching vibration. It is shifted to lower wave number because of the complex formation, suggesting that coordination of the Schiff base groups through N- atoms with the metal ion. The band at 3496 cm-1 is due to aromatic N-H stretching, It is noted that a broad band of the asymmetric and symmetric O-H stretching mode around the region 3400 cm-1 presumably due to H-O-H bending vibrations are not observed in the spectrum of complexes, which are indicating of the absence of the water molecule.
A. Xavier et al., "Synthesis and Characterization of Schiff Base with Bivalence Transition Metal Complexes Namely Cu, Co, Ni, Mn and Fe", Materials Science Forum, Vol. 699, pp. 265-271, 2012