The Stability of Some Metal Complexes in Mixed Solvents

Acidity constants and stability constants of certain metal complexes (nickel(II), zinc(II), and manganese(II)) with ethylenediamine and glycine were determined at 25 °C and in 0.1 M ionic strength in mixed aqueous solutions of methanol (MeOH), dioxane (DOX), acetonitrile (MeCN), and dimethylformamide (DMF). In general, the stability constants of the metal complexes and the first protonation constant of glycine increase with increasing …