MCQ
Which of the following chemical system is non aromatic ?
- A
- B
- C
- ✓
✓
Answer
Correct option: D.
d
The molecules which do not satisfy Huckel rule or $(4 n+2) \pi$ -electron rule are said to be nonaromatic. The compound (d) has total $4 \pi e^-$. It does not follow $(4n + 2)$ rule. So it is non-aromatic compound. All other compounds $(a, b, c)$ are planar and have $6 \pi e^{-},$ so they are aromatic.
The molecules which do not satisfy Huckel rule or $(4 n+2) \pi$ -electron rule are said to be nonaromatic. The compound (d) has total $4 \pi e^-$. It does not follow $(4n + 2)$ rule. So it is non-aromatic compound. All other compounds $(a, b, c)$ are planar and have $6 \pi e^{-},$ so they are aromatic.
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