Question

Which from following is a non benzenoid aromatic compound?

• A. Aniline
• B. Tropone
• C. Naphthalene
• D. Phenol

Hint:

Benzenoid aromatic compounds contain benzene rings. If aromaticity is present without a benzene ring, the compound is non-benzenoid.

Answer 1

The Correct Option is B

Concept:
Benzenoid aromatic compounds contain one or more benzene rings. Non-benzenoid aromatic compounds are aromatic but do not contain a benzene ring.

Step 1: Check the benzenoid compounds.

• Aniline contains a benzene ring.
• Naphthalene contains fused benzene rings.
• Phenol also contains a benzene ring. So these are benzenoid aromatic compounds.

Step 2: Identify the non-benzenoid aromatic compound.
Tropone is aromatic but does not contain a benzene ring. So it is a non-benzenoid aromatic compound. Hence, the correct answer is:
\[ \boxed{(B)\ \text{Tropone}} \]