Synthesis, Analysis and Antibacterial Studies of Co(II) and Ni(II) Schiff Base Complexes Derived from 2,4-Dinitrophenylhydrazine and Benzaldehyde

Abstract

The Schiff base ligand has been synthesized by the reaction of ethanolic solution of benzaldehyde and 2,4-dinitrophenylhydrazine. The corresponding metal complexes were obtained by refluxing the chlorides of Co(II) and Ni(II) with the prepared Schiff base in an ethanolic medium. The Schiff base and its metal complexes were established and analyzed by FT-IR, solubility test, melting point/decomposition temperature and conductivity measurement. The melting point of the Schiff base was found to be 157C and decomposition temperature of Co(II) and Ni(II) complexes were found to be 167°C and 174°C respectively. Molar conductance values of Co(II) and Ni(II) complexes are 1.31 and 2.04 µS/cm respectively. The solubility test carried out showed that the complexes are soluble in most organic solvents and insoluble in water. The antibacterial activity test of the ligand and metal complexes showed that the metal complexes were found to be active against the organism tested while the ligand was inactive.