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.