A Kinetic Study of the Solvent Effect of Tertiary Alcohol on the Thermodynamic Extensive Properties of the Catalysed Solvolysis of Heavy Acetate in Aquo-t-butanol Solvent Systems

The solvent effect of a tertiary alcohol was studied on the themodynamic extensve properties of solvolysis of a heavy acetate (butyl acetate) in different aquo-t-butanol reaction media containing 20 to 80% (t-butanol) at different temperatures varying from 20 to 40°C. From the enhancement observed in ΔG* values with simultaneous decrease in the values of ΔH* and AS of the reaction, it is inferred that the organic co-solvent t-butanol acts as entropy controller and enthalpy stimulator solvent for alkali catalysed hydrolysis of butyl acetate From the evaluated values of water moleculex associated with the activated complex of the reaction which are found to increase with increase in the temperature of the reaction, it is inferred that the bimolecular mechanistic path is changed to unimolecular in presence of the organic component (t-butanol) of the reaction media. The numerical value of Iso-kinetic temperature of the reaction which comes to be nearly 287.0 (below 300) indicates that there is weak but considerable solvent-solute interaction in the aquo-t-butanol reaction media