Organic Chemistry Basics 2 Question 12
12. Which of the following molecules is least resonance stabilised?
(2017 Main) (a)
(b)
(c)
(d)
Show Answer
Answer:
Correct Answer: 12. (d)
Solution:
- Aromatic compounds are stable due to resonance while non-aromatics are not. According to Huckel’s rule (or $4 n+2$ rule), “For a planar, cyclic compound to be aromatic, its $\pi$ cloud must contain $(4 n+2) \pi$ electrons, where, $n$ is any whole number.” Thus,
are aromatic and stabilised by resonance.
They follow Huckel’s rule.
is non-aromatic, hence, least stabilised by resonance.
