Abstract
The effect of anionic surfactant, di-octyl sodium sulphosuccinate (AOT) and nonionic surfactant, polyoxyethylene sorbitan monooleate (Tween-80) on the hydrolysis of di-2,3-dichloroaniline phosphate was studied spectrophotometrically at 303 K. The influence of inorganic salts on the reaction rate was studied. The added salts viz. KCl, KNO 3 , and K 2 SO 4 accelerated the rate of the reaction in the presence of anionic and nonionic micelles. The role of anionic and non-ionic micelle has been explained by the Menger-Portnoy, and Piszkiewicz models. The binding constant (K s ), rate constant ( k ψ ) in the micellar phase, cooperativity index (n) and various thermodynamic activation parameters viz. ∆E a , ∆S ≠ , ∆H ≠ , ∆G ≠ etc. have been evaluated. Possible reaction mechanism has been proposed on the basis of the observed kinetic data.
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