Determination of Stability Constants of Compl...

Determination of Stability Constants of Complex of Divalent Metal Ion With Butyl 4-(2-Hydroxybenzylideneamino) Benzoate by Potentiometric Method

Author Name : Neha Nanda

ABSTRACT

Studies of complexation of Schiff based ligand, BUTYL 4-(2-HYDROXYBENZYLIDENEAMINO)BENZOATE with Cu(II) metal ion have been carried out potentiometrically by Calvin Bjerrum pH titration technique. The proton-ligand stability constant and the stepwise stability constants of its metal ligand complex were determined at three different temperatures (30°, 40°, 50°C), where ionic strength was maintained at 0.1 M using KNO₃. The corresponding thermodynamic parameters ∆G, ∆H and ∆S for the complexation were also calculated from overall stability constant data.

Keywords: BUTYL 4-(2-HYDROXYBENZYLIDENEAMINO)BENZOATE, Calvin Bjerrum pH titration technique, Potentiometric studies.