Synthesis and Structural , spectroscopic Study of Novel Tetradentate Macrocyclic Ligand Type N2S2 Donor Atoms [Bis-N-ethyl-2,2 (l-,2-_ethylene disulphide)malonamide] and It’s Complexes with VO(II),Cr(III),Co(II) ,Ni(II), Cu(II),Zn(II),Cd(II) and Hg(II). مجلة ديالى للبحوث الانسانية, Iraq, v. 1, n. 42, p. 1–22, 2022. DOI: 10.57592/djhr.v1i42.680. Disponível em: https://djhr.uodiyala.edu.iq/index.php/DJHR2022/article/view/680. Acesso em: 2 2025.