SYNTHESIS AND SPECTROSCOPIC CHARACTERIZATION OF BIDENTATE SCHIFF BASE AND ZINC(II) COMPLEX

A new asymmetric bidentate Schiff base ligand was synthesized from 4-Methoxysalicylaldehyde. The complex was prepared by adding Zn(II) acetate salt dissolved in methanol to the Schiff base ligand. The ligand and its metal complex were characterized by elemental analysis (CHN), FT-IR, UV-Vis spectroscopy, 1H NMR, TG/DTG, SEM and conductometric measurements. The spectroscopic data reveals that the Zn(II) atom in the center of the complex is four-coordinated by two phenolic oxygen atoms and two azomethine nitrogen atoms of two Schiff base ligands. The Zn(II) complex is diamagnetic as expected for d10 metal ions in a tetrahedral geometry. The Zn(II) complex is soluble in DMSO and DMF and is insoluble in acetone, chloroform, ethanol and methanol. The conductance data indicate that the complex is non-electrolytes.

Keywords:

Schiff base, Zinc(II) complexes, IR analysis Thermogravimetric analysis,

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