Question

Conversion of Chlorobenzene to 1-Chloro-4-methylbenzene is

• A. Wurtz reaction
• B. Swarts reaction
• C. Wurtz-Fittig reaction
• D. Friedel-Crafts reaction

Answer 1

The correct option is D

Friedel-Crafts reaction

.The explanation for the correct answer:

Option (D): Friedel-Crafts reaction

1. In this reaction, the aromatic compound undergoes electrophilic substitution.
2. The protons of the aromatic ring are substituted by electrophiles in the presence of Lewis acid( generally ${\mathrm{AlCl}}_3$ or ${\mathrm{FeCl}}_3$).
3. If the protons of the aromatic compounds are substituted by the alkyl group then this type of reaction is known as the Friedel-Craft alkylation reaction.
4. Example: Conversion of Chlorobenzene to 1-Chloro-4-methylbenzene.

The explanation for the incorrect answer:

Option (A): Wurtz reaction

In the Wurtz reaction, Alkyl halides are treated with sodium metal to generate higher alkanes.

Option(B): Swarts reaction

Swarts reaction is used to convert alkyl Chloride or alkyl Bromide to alkyl Fluoride.

Option (C): Wurtz-Fittig reaction

In the Wurtz-Fittig reaction, alkyl halide combines with aryl halide in presence of Sodium to form alkyl benzene.

So, Option (D) is correct. Conversion of Chlorobenzene to 1-Chloro-4-methylbenzene is carried out by Friedel-Crafts alkylation reaction.