Synthesis and Spectroscopic Characterization of New N4O4 Ligand and Its Transition Metal Ion Complexes with Ni(II), Zn(II) and Cd(II). ANJS [Internet]. 2018 Jun. 24 [cited 2024 Apr. 29];17(4):27-32. Available from: https://anjs.edu.iq/index.php/anjs/article/view/373