Which one of the following undergoes nucleoph | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Nucleophilic aromatic substitution $(S_NAr)$ reactions are facilitated by the presence of electron-withdrawing groups (EWGs) on the benzene ring,e

Vedclass · Accepted Answer

p-Nitrochlorobenzene

Vedclass · Answer

(A) Nucleophilic aromatic substitution $(S_NAr)$ reactions are facilitated by the presence of electron-withdrawing groups (EWGs) on the benzene ring,especially at ortho and para positions.These groups stabilize the negatively charged intermediate (Meisenheimer complex) through resonance ($-M$ effect) and induction ($-I$ effect).The order of electron-withdrawing strength for the substituents at the para position is: $NO_2 > Cl > CH_3 > OCH_3$.$NO_2$ is a strong electron-withdrawing group ($-M$ and $-I$ effect),which significantly increases the rate of $S_NAr$ reaction.Therefore,$p$-Nitrochlorobenzene undergoes nucleophilic aromatic substitution at the fastest rate.

Which one of the following undergoes nucleophilic aromatic substitution at the fastest rate?

Similar Questions

How many reactions of aryl halides with metals are there? Explain with examples.

An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. $H_{2}SO_{4}$ and conc. $HNO_{3}$. Indicate the correct statement from the following.

Chlorobenzene is:

Product $A$ of the given reaction is

Which of the following undergoes hydrolysis most easily?

Vedclass Test Series

Exam Paper Generator

Online Exam Module