question_answer

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

A)  I and IV                               

B)  II and IV

C)  I and III                               

D)  II and III

Correct Answer: D

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.