question_answer

Nitration of aniline is achieved by

A)  direct treatment with nitration mixture under reflux

B)  using fuming \[HN{{O}_{3}}\]

C)  acetylation followed by nitration and subsequent hydrolysis

D) \[KN{{O}_{3}}+conc\,\,HN{{O}_{3}}\]

Correct Answer: C

Solution :

Direct nitration of aniline with \[HN{{O}_{3}}\] gives a complex mixture of mono, di and tri-nitro compounds and oxidation products. If\[N{{H}_{2}}\]group is protected by acetylation and then nitrated, \[p-\]isomer is the main product.