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. doi:10.57592/djhr.v1i42.680