Substitution effect on metal complexes of 2-hydroxybenzoic acid
Stability constants of 2-hydroxybenzoic acid, 2-hydroxy, 5-sulphobenzoic acid and 2-hydroxy, 3-methyl, 5-sulphobenzoic acid with metal ions Mn I I , Co I I , Ni I I and Zn I I have been determined by pH titration technique at an ionic strength of 0.1 NaCiO 4 . The trend in the stability constant reveals that the electronic effects of the substituents play an important role and it is possible to predict the value of stability constant of substituted 2-hydroxybenzoic acid from the value of parent acid to certain extent.