REACTION OF DIETHYL ETHYLENEBIS(BETA-AMINOCROTONATE) WITH MX2 - SYNTHESIS AND CHARACTERIZATION OF ETHYLENEBIS(ISONITROSOETHYLACETOACETATEIMINO)M(II) COMPOUNDS [M = NI, CU, CO, MN, ZN, CD AND X = CH3COO-]

Ethylenebis(isonitrosoethylacetoacetateimino)M(II) compounds for M = N i, Cu, Co, Mn, Zn and Cd are formed by the reaction of diethyl ethylen ebis(beta-aminocrotonate) with metal acetates in the presence of NaNO2 in acid medium. The ligand precursor, diethyl ethylenebis(beta-aminoc rotonate), rearranges to N,N'-ethylenebis(isonitrosoethylaceloacetatei mine) H2L, which further loses two protons in the presence of transiti on metal ions and forms metal complexes [ML]. The proposed structures of the Ni(II) and Cu(II) compounds are square-planar, the Co(II) and M n(II) compounds are octahedral and the Zn(II) and Cd(LI) compounds are tetrahedral. The compounds were characterised by IR,H- 1 NMR, UV-Visi ble spectroscopic studies, magnetic moments, conductance measurements and elemental analyses.