Question

Which compound(s) out of the following is/are not aromatic ?

• A. C and D
• B. B, C and D
• C. A and C
• D. B and D

Answer 1

The correct option is B B, C and D


In (A), $2\pi$ electrons obeys the $(4n+2)\pi$ rule, cyclic and conjugated, so aromatic.
In (B), $4\pi$ electrons, does not obey the $(4n+2)\pi$ rule, so anti-aromatic.
In (C), $8\pi$ electrons, does not obey the $(4n+2)\pi$ rule so anti-aromatic.
In (D), system is not conjugated, so non-aromatic.