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. cbej [Internet]. 2022 Dec. 20 [cited 2025 Apr. 29];19(77):51-60. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/8076