The preferred reagent for the following conversion is $$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH} ightarrow…

The preferred reagent for the following conversion is $$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH} ightarrow \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COCl} $$
  1. $\mathrm{HCl}$
  2. $\mathrm{HOCl}$
  3. $\mathrm{SOCl}_2$
  4. $\mathrm{NaOCl}$

Solution

A carboxylic acid can be converted into its functional derivative ; acyl halide by use of thionyl chloride $\mathrm{SOCl}_2$.
This reaction is a nucleophilic acyl substitution with $\mathrm{SOCl}_2$ acting as a good nucleophilic reagent. *

Asked in: JEE-TOPICTESTS-CHEMISTRY

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