Abstract
A modest attempt has been made for the synthesis of hydrazoneoxime ligands bearing pyrazolone group (1-4) and their successive metal complexes such as: 1(a-c), 2(a-c), 3(a-c) and 4(a-c). The precursor (1Z,2E)-2-(hydroxyimino) ethanehydroximohydrazide (GH(2)) was obtained through coupling of (1Z,2E)-N-hydroxy-2-(hydroxyimino) ethanimidoyl chloride and hydrazinium hydroxideto generate hydrazonoxime compounds bearing the pyrazolone group. The ligands (1-4) were reacted with MX2 center dot nH(2)O, where M = Co(II), Ni(II) and Cu(II) to obtain the successive metal coordinated compounds into good yields. The ligands and their metal complexes were investigated by using H-1 NMR, C-13 NMR, FT-IR, elemental analysis and magnetic susceptibility measurements. Tautomerism in the ligands is investigated spectroscopically and biological activities are evaluated as well. Finally, the findings of present study were found within good egreement with other workers.