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

