Co(II), Ni(II) and Cu(II) Mononuclear Complexes with N2O2 Ligand Derived from Ethyl 4-Aminobenzoate

By condensation reaction between P-amino benzoic acid and ethanol in the presence of concentrated H2SO4 to produce ethyl 4-aminobenzoate, which was then converted into N, N'-(1,2-phenylene) bis(4-aminobenzamide) type [H2L] (N2O2) product by direct interaction between the two reactive molecules of this product with one molecule of 1,2-Benzene diamine, as a new series of metal conversion complexes of Co(II), Ni(II), and Cu(II). The prepared ligand and their complexes characterized in the solid and solution states using spectroscopic techniques such as UV-Vis, FT.IR, 1HNMR, and the elemental analyses as well as melting temperatures, molar conductivity, and magnetic susceptibility. The octahedral geometry around the central metal is suggested by molar conductivity, magnetic moment, molar ratio, and spectroscopic data about copper and cobalt ions, while tetrahedral around the nickel ion. After the incubation period at 37 °C for 24 h, the biological behavior of the binding produced with its anti-bacterial compounds against (Staphylococcus aureus and Escherichia coli) was examined at different concentrations (10, 50, and 200) ppm. The results showed that the performance of the prepared compounds was better in resisting and reducing the growth of bacteria tested at high concentrations.