JEE PYQ: General Organic Chemistry Question 43
Question 43 - 2019 (09 Jan Shift 2)
Which of the following compounds is not aromatic?
(1) Cyclopentadienyl cation (with O)
(2) Pyrrole
(3) Pyridine
(4) Furan
Show Answer
Answer: (1)
Solution
Compounds (2), (3) and (4) are containing $6\pi e^-$ in complete conjugation and are aromatic. Compound (1) is anti-aromatic as it has $4\pi e^-$ in complete conjugation and doesn’t obey Huckel rule.
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