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Q. Which of the following species could be expected to exhibit aromatic character?
Select the correct answer from the followingChemistry Question Image

J & K CETJ & K CET 2003

Solution:

Tropylium cation is planar and have $ 6\pi - $ electron according to Huckel rule, hence it is aromatic.
Cyclopentadienyl anion is planar and have $ 6\pi - $ electron, hence it is also aromatic compound.

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