(a)
Interpretation: The species which are used for the transesterification of esters other than acids has to be predicted.
Concept introduction: Transesterification is the process of formation of a new ester molecule from the reaction of alcohol and an ester. This is like hydrolysis of ester but here nucleophile is alcohol molecule instead of
If a better nucleophile is used in place of alcohol molecule that will also increase the rate of transesterification reaction. The conjugate base of an alcohol is an alkoxide which is a better nucleophile and can attack the carbonyl carbon even its oxygen is not protonated.
(b)
Interpretation: The rate of aminolysis reaction of esters does not increase in presence of
Concept introduction: The reaction of a carboxylic acid derivative with ammonia, primary and secondary
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