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Friedel-crafts Alkylation

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Friedel-Crafts alkylation of benzene requires:

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About This Question

Subject
chemistry
Chapter
hydrocarbons
Topic
friedel-crafts alkylation
Difficulty
Easy
Year
2025
Tags
Friedel-CraftsAlkylationLewis Acid

Solution

Correct Answer:

AlCl₃ catalyst

Friedel-Crafts Alkylation is used to introduce an alkyl group into the benzene ring.

  • Reagents: Alkyl halide () and a Lewis Acid catalyst such as anhydrous .
  • Function of : It acts as a Lewis acid to generate the electrophile (carbocation, ) by accepting a lone pair from the halogen. Reaction:
  • Limitations include carbocation rearrangement and polyalkylation.

This easy difficulty chemistry question is from the chapter hydrocarbons, covering the topic of friedel-crafts alkylation. It appeared in the 2025 exam.

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