Question

Which of the following is not an aromatic compound?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

A compound is called aromatic if it satisfies the following conditions:
1. Cyclic
2. Planar (all $s{p}^2$ hybrid $C$ atoms)
3. Follows Huckel's $(4n+2)\pi \text{-}{e}^{-}$ rule
4. Conjugated
Option (b) compound have $s{p}^3$ hybrid $C$ atoms. Hence it is not an aromatic compound.