Question

Among the following, the reaction that proceeds through an electrophilic substitution, is:

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is B

To determine which reaction among the provided options proceeds through an electrophilic substitution, we need to understand the basic concept of electrophilic substitution reactions.

Electrophilic substitution reactions are characteristic of aromatic compounds such as benzene and its derivatives. In these reactions, an electrophile replaces a hydrogen atom in the aromatic ring, maintaining the aromaticity of the compound.

Let's analyze the options one by one:

1. Look at each of the reaction options. Recall that electrophilic substitution typically occurs in reactions involving aromatic compounds (such as bromination of benzene, nitration, sulfonation, etc.).
2. The first option involves a typical reaction with an aromatic ring undergoing electrophilic substitution.
3. Cross-reference the reaction from the second image option.

The correct reaction that proceeds through electrophilic substitution is:

The above image option represents an electrophilic substitution reaction where the aromatic ring undergoes substitution by an electrophile, preserving the aromatic nature of the compound.

Explanation:

In the reaction represented by the above image:

• The aromatic compound undergoes a reaction with a strong electrophile.
• An electrophile attacks the π-electrons of the aromatic ring, forming an intermediate sigma complex.
• Subsequently, the complex loses a hydrogen ion, resulting in the substitution of the hydrogen on the ring with the electrophile.

This mechanism typifies electrophilic aromatic substitution, reinforcing that the reaction in the correct answer is indeed electrophilic substitution.