“Synthesis, Spectral Characterization and Biological Studies of the Ligand Type N2O4 Schiff- Bases and Their (Fe (II), Zn (II), Cd (II) and Hg (II)) Complexes”. Journal of the College of Basic Education, vol. 19, no. 77, Dec. 2022, pp. 51-60, https://doi.org/10.35950/cbej.v19i77.8076.