Question detail
Which of the following best describes the role of the electrophile in the electrophilic substitution of benzene?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Aromatic chemistry (A-level only)
Question
- A. A species that donates electrons
- B. A species that accepts electrons
- C. A species that stabilizes the benzene ring
- D. A species that forms a covalent bond with benzene
Answer
A species that accepts electrons
Explanation
The electrophile is a species that accepts electrons from the benzene ring during the electrophilic substitution process, facilitating the substitution reaction.
Common mistake
Incorrect intermediate: benzyl cation
Students think the electrophilic substitution proceeds via a benzyl carbocation intermediate that retains aromaticity.
The correct intermediate is a σ‑complex (arenium ion) where the aromatic π system is temporarily disrupted; aromaticity is restored after deprotonation.
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