Question

In $S_{N}Ar$ i.e. Substitution Nucleophilic aromatic reaction, the rate determining step(s) is/are:

• A. Attack of the nucleophile ​
• B. Removal of the leaving group
• C. Both (a) and (b)
• D. None of the above.

Answer 1

The correct option is A Attack of the nucleophile ​

Steps involved in the mechanism of $S_{N}Ar$ i.e. Substitution Nucleophilic aromatic reaction :

1. Attack of the nucleophile .
2. Removal of the leaving group.

The rate determining step is the attack of nucleophile and thus the formation of Meisenheimer complex.
1.

2.