question_answer

Antiaromaticity is a characteristic of a cyclic molecule with a u electron system that has higher energy due to the presence of 4 n electrons in it. Anti aromatic compounds are highly unstable and highly reactive. Which of the following annulene is anti-aromatic in nature?

A)  Benzene                       

B)  Napthalene

C)  Cyclobutadiene 

D)  Cyclooctatetraene

Correct Answer: C

Solution :

A planar cyclic conjugated \[4n\,\pi \] electron system is antiaromatic. \[4n \pi  = 4\pi \] \[n=1\] It is planar and cyclic also.