question_answer

Identify the compound which is not aromatic.

A)                                         

B)

C)                                             

D)  

Correct Answer: D

Solution :

 In [a] and [c] the lone pair on N-atom is involved in resonance. Hence, these show aromaticity. [b] is already aromatic but structure [d] is not planar as one of the carbon is \[s{{p}^{3}}\] hybridised.