question_answer

Nitrobenzene on nitration produce :

A) o-dinitrobenzene

B) m-dinitrobenzene

C) p-dinitrobenzene

D) none of the above

Correct Answer: B

Solution :

\[-N{{O}_{2}},-CN,CHO\] \[-COR,-COOH,-COOR,\] \[-S{{O}_{3}}H\] etc. are meta directing group. These reduce the reactivity of benzene ring through resonance effect by reducing electron density on ortho and para position. Therefore, attack take place on meta position. Upon nitration nitrobenzene yield m-dinitro- benzene.