Abstract

K. K. Gupta, Tejinder Kaur and Ekta Dadhich^*

The metal ligand stability constants of carboxy methyl mercapto succinic acid with some transition metals ions have been determined in dioxane –water mixture at ionic strength µ= 0.1M(KNO₃) at three different temperature (25°,35° and 45°C) employing Bjerrum-Calvin pH titration technique. The stability of complexes follows the order   Cu²⁺→ Ni²⁺→ Mn2+  The free energy, enthalpy and entropy changes involved in the complexation have also been evaluated at 35°C in 40%(v/v) dioxane – water mixture.

Free energy; Dioxane; Potentiometry; Stability constant

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