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). DJHR 2022, 1 (42), 1-22. https://doi.org/10.57592/djhr.v1i42.680.