Question

Identify the compound [A] and [B] in the reaction given below:

$$\mathrm{C}{\phantom{A}}_6\mathrm{H}{\phantom{A}}_6\underset{\mathrm{AlCl}{\phantom{A}}_3(\mathrm{anhy}\cdot )}{\overset{\mathrm{CH}{\phantom{A}}_3\mathrm{Cl}}{\to }}[\mathrm{A}]\underset{\mathrm{KrCr}{\phantom{A}}_2\mathrm{O}{\phantom{A}}_7+\mathrm{H}{\phantom{A}}_2\mathrm{SO}{\phantom{A}}_4}{\overset{\text{[O]}}{\to }}[\mathrm{B}]$$

Answer 1

$$\underset{\mathrm{Benzene}}{\mathrm{C}{\phantom{A}}_6\mathrm{H}{\phantom{A}}_6}\underset{\mathrm{AlCl}{\phantom{A}}_3(\mathrm{Anhy}\cdot )}{\overset{\mathrm{CH}{\phantom{A}}_3\mathrm{Cl}}{\to }}\underset{\mathrm{Toluene}[\mathrm{A}]}{\mathrm{C}{\phantom{A}}_6\mathrm{H}{\phantom{A}}_5\mathrm{CH}{\phantom{A}}_3}\underset{\mathrm{KrCr}{\phantom{A}}_2\mathrm{O}{\phantom{A}}_7+\mathrm{H}{\phantom{A}}_2\mathrm{SO}{\phantom{A}}_4}{\overset{\text{[O]}}{\to }}\underset{\mathrm{Benzoic}\mathrm{acid}[\mathrm{B}]}{\mathrm{C}{\phantom{A}}_6\mathrm{H}{\phantom{A}}_5\mathrm{COOH}}$$