Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2012 Vol: 4 Issue: 8

Metal-ligand stability constants of Co (II), Ni (II) and Cu (II) metal ion complexes with N-(5-methyl-2-hydroxyacetophenone)-Nâ??-(2- hydroxyacetophenone) ethylenediamine at 0.1 M ionic strength pH metrically


The interaction of Co(II), Ni(II) and Cu(II) metal ions with N-(5-methyl-2-hydroxyacetophenone)-N’-(2- hydroxyacetophenone) ethylenediamine have been studied at 0.1M ionic strength in 70% Dioxane-water mixture by Bjerrum method as adopted by Calvin and Wilson. It is observed that Co(II), Ni(II) and Cu(II) metal ions form 1:1 complexes with ligand (L). The data obtained were used to estimate and compare the values of proton-ligand stability constant (pK) and metal-ligand stability constant (logK), from estimated data (pK and log K),