Question

Which of the following reactions belong to electrophilic aromatic substitution?

Answer 1

Analysing the options
Option $\left(A\right)$: Bromination of acetanilide
In electrophilic aromatic substitution reactions, an electrophile replaces an atom that is attached to an aromatic ring. Mostly, it involves the replacement of a hydrogen atom attached to a benzene ring with an electrophile. As the bromination of acetanilide involves the substitution of aromatic hydrogen by an electrophile, it is an electrophilic aromatic substitution reaction.

Reaction is:


Option $\left(B\right)$: Coupling reaction of aryldiazonium salts
The coupling reaction of an aryl diazonium salt involves the substitution of aromatic hydrogen by an electrophile. Therefore, it is an electrophilic aromatic substitution reaction.


Option $\left(C\right)$: Diazotization of aniline
In the diazotization of aniline, nitrogen atoms are involved in the reaction. In this case substitution doesn't take place at the aromatic ring, so this is not an electrophilic aromatic substitution reaction


Option $\left(D\right)$: Acylation of aniline.
In the acylation of aniline, substitution doesn't take place at the aromatic ring, so this is also not an electrophilic aromatic substitution reaction.


So, options $\left(A\right)$ and $\left(B\right)$ are the correct answers.