The major product in the following reaction is:
Hydrocarbons · Class 11 · JEE Main Previous Year Question
The major product in the following reaction is:
- a
- b
- c✓
- d
Answer: Option (c)
Note: The answer key marks (c) as correct (ring expansion to 6-membered ring).
Key Points to Remember:
- 5-membered ring → 6-membered ring expansion is favorable (relieves ring strain)
- Ring expansion occurs via 1,2-alkyl or hydride shift in carbocations
- The driving force: 6-membered ring is more stable than the 5-membered ring
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