1.

Which of the following carboxylic acids is most reactive toward esterification ?

Answer»

`(CH_(3))_(3)C COOH`
`CH_(3))_(2)CHCOOH`
`CH_(3)CH_(2)COOH`
`(C_(2)H_(5))_(2)CHCOOH`

SOLUTION :`CH_(3)CH_(2)COOH` is most REACTIVE towords esterification. The esterification of carboxylic acids with alcohols is a kind of nucleophilic acyl substitution. Protanation of the carbonyl OXYGEN activates of carbonyl group towards nucleophilic addition of alcohol. Therefore,carboxylic ACID with less number of electron releasing group most reactive.


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