Question:
Which of the following compound does not exhibit aromaticity?
Which of the following compound does not exhibit aromaticity?
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Remember the four criteria for aromaticity: cyclic, planar, fully conjugated, and (4n+2) π electrons.
Updated On: Apr 24, 2026
- Cyclohexene
- Benzene
- Thiophene
- Pyridine
- Naphthalene
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Aromaticity requires a planar, cyclic, conjugated system with (4n+2) π electrons (Huckel's rule).
Step 2: Detailed Explanation:
• Cyclohexene: It is a cyclic alkene but not fully conjugated. It has a double bond, but the ring is not a continuous conjugated system. It does not follow Huckel's rule and is not aromatic.
• Benzene, Thiophene, Pyridine, Naphthalene: These are all classic aromatic compounds. They are planar, cyclic, and have (4n+2) π electrons (6, 6, 6, and 10 respectively).
Step 3: Final Answer:
Cyclohexene does not exhibit aromaticity.
Aromaticity requires a planar, cyclic, conjugated system with (4n+2) π electrons (Huckel's rule).
Step 2: Detailed Explanation:
• Cyclohexene: It is a cyclic alkene but not fully conjugated. It has a double bond, but the ring is not a continuous conjugated system. It does not follow Huckel's rule and is not aromatic.
• Benzene, Thiophene, Pyridine, Naphthalene: These are all classic aromatic compounds. They are planar, cyclic, and have (4n+2) π electrons (6, 6, 6, and 10 respectively).
Step 3: Final Answer:
Cyclohexene does not exhibit aromaticity.
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