Question

Which one of the following compounds is non- aromatic?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B


(a), (c) and (d) are aromatic since they are cyclic planar, have delocalized $4n+2\pi e^{-}$
(b) is non-aromatic since it has $s{p}^3$ hybridised carbon and hence non-planar