Kinetics and Dipolar Protic Solvent Effect on Activation Parameter of Base Catalised Hydrolysis of Propyl Hexanoate in Aqueous Solvent System

Anil K. Singh

Department of Chemistry, Teerthanker Mahaveer University, Moradabad, INDIA

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The solvent effect of dipolar protic solvent on propyl hexanoate are investigated in water-propanol solvent system of different composition and different temperature ranging from 20 to 40 oC.The specific rate constant values of the reaction was found to decrease with gradual addition of propanol in reaction media. Enhancement in numerical values of free energy of activation (DG*) with simultaneous increase in enthalpy of activation (DH*) and entropy of activation ( DS*)  of reaction reveals that propanol acts as entropy inhibitor and enthalpy stimulator solvent. The iso- kinetic temperature of reaction was evaluated to be 332.52 which is greater than 300. reveals that there is strong and appreciable solvent-solute interaction in reaction media.

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