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Question

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


A

Wurtz reaction

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B

Swarts reaction

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C

Wurtz-Fittig reaction

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D

Friedel-Crafts reaction

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Solution

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 AlCl3 or FeCl3).
  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.


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