Question

Among the following the aromatic compound is :

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

For a compound to be aromatic, it has to follow Huckel's rules:

1. The compound must be planar and all the atoms that form the cycle should be $s{p}^2$ hybridized.
2. There should be $(4n+2)-\pi$ electrons - all of which are delocalized within the ring.

Cyclopropenyl cation has a planar cyclic system with $2\pi e^{-}s$, with $n=0$ and is definitely aromatic.