Question

Para nitro chloro benzene undergoes nucleophilic substitution faster than chlorobenzene by

Answer 1

Hi there,

In Chlorobenzene, the Negative Charge is delocalized inside the ring whereas, in the p-Nitrochlorobenzene, the presence of Strong Electron withdrawing Group like Nitro more delocalizes the charge because it comes on the Electronegative O atom. We know that more is that the delocalization, more is that the resonance, the Stable is that the intermediate Product formed and therefore more is that the rate of reaction.

Hope it helped.