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What is the role of a catalyst in electrophilic aromatic substitution reactions?

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Question: What is the role of a catalyst in electrophilic aromatic substitution reactions?

Options:

  1. To stabilize the product
  2. To generate the electrophile
  3. To increase the temperature
  4. To decrease the reaction time

Correct Answer: To generate the electrophile

Solution: 

The catalyst in electrophilic aromatic substitution reactions, such as AlCl3 or FeBr3, is used to generate the electrophile that will react with the aromatic compound.

What is the role of a catalyst in electrophilic aromatic substitution reactions?

Practice Questions

Q1
What is the role of a catalyst in electrophilic aromatic substitution reactions?
  1. To stabilize the product
  2. To generate the electrophile
  3. To increase the temperature
  4. To decrease the reaction time

Questions & Step-by-Step Solutions

What is the role of a catalyst in electrophilic aromatic substitution reactions?
  • Step 1: Understand what a catalyst is. A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.
  • Step 2: Know what electrophilic aromatic substitution (EAS) reactions are. These are reactions where an electrophile replaces a hydrogen atom on an aromatic compound.
  • Step 3: Identify the role of the catalyst in EAS. The catalyst helps to create the electrophile that will react with the aromatic compound.
  • Step 4: Recognize examples of catalysts used in EAS, such as AlCl3 (aluminum chloride) or FeBr3 (iron bromide).
  • Step 5: Conclude that without the catalyst, the electrophile may not form, and the reaction would not proceed efficiently.
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