Question

The presence of nitro (-NO2) group at o/p position increases the reactivity of haloarenes towards nucleophilic substitution reactions. Why?

Answer 1

The -NO2 group situated at o/p position can effectively withdraw electron from the aryl ring as electron can enters into the -NO2 group by resonance only when it is in o/p position. In the meta position this resonance effect does not occur.

Answer 2

Answer:

Explanation:

The NO2 group is electron withdrawing group which when present on benzene ring withdraws electron from benzene ring due to resonance, creating deficiency of electrons on ortho and para position. And the group (NO2)

attacks easily on electron deficiency site.