Question

A compound is non aromatic. Which of the following may be true?

• A. No pi electrons are present.
• B. Pi electrons are not delocalised.
• C. The compound has non planar structure.
• D. All of the above.

Answer 1

The correct option is D All of the above.

A compound is non aromatic. The following may be true.
(A) No pi electrons are present.
(B) Pi electrons are not delocalised.
(C) The compound has non planar structure.
Note:
(1) A cyclic planar compounds with a conjugated system of 4n $+$ 2 pi electrons is aromatic.
(2) A cyclic planar compounds with a conjugated system of 4n pi electrons is anti -aromatic.
All the remaining compounds are non aromatic.