JEE PYQ: General Organic Chemistry Question 1
Question 1 - 2021 (16 Mar Shift 1)
Among the following, the aromatic compounds are:
(A) A bicyclic compound with a cycloheptatrienyl ring fused to a $=\text{CH}_2$ group (non-aromatic) (B) Biphenyl (two fused benzene rings — aromatic) (C) Cyclopentadienyl anion (aromatic) (D) Tropylium cation (cycloheptatrienyl cation — aromatic)
Choose the correct answer from the following options:
(1) (A) and (B) only
(2) (B) and (C) only
(3) (B), (C) and (D) only
(4) (A), (B) and (C) only
Show Answer
Answer: (2)
Solution
(A) is non-aromatic, (B) is aromatic, (C) is aromatic (cyclopentadienyl anion has $6\pi e^-$), (D) is anti-aromatic. So (B) and (C) are the aromatic compounds.
BETA
