JEE PYQ: General Organic Chemistry Question 46
Question 46 - 2019 (11 Jan Shift 1)
Which compound(s) out of the following is/are not aromatic?
(A) Azulene (B) Cyclopentadienyl cation (C) Tropone (cycloheptadienone) (D) Cycloheptatriene
(1) (B), (C) and (D)
(2) (C) and (D)
(3) (B)
(4) (A) and (C)
Show Answer
Answer: (1)
Solution
Azulene is aromatic; $(4 \times 0 + 2) = 2\pi e^-$ in conjugation… Cyclopentadienyl cation and cycloheptatriene are antiaromatic. The compound with $sp^3$ carbon is non-aromatic due to the presence of $sp^3$ carbon.
BETA
