Question

Among the following, the antiaromatic compounds are:

• A. I and IV
• B. III and IV
• C. II and V
• D. I and III

Answer 1

Answer: (B)

III and IV

For antiaromatic compounds there are $4n\pi$ electrons.It must be cyclic and planar.

$I$ and $II$ are aromatic because they have 10 and 6 electrons which does not satisfy condition of antiaromatic compounds.

$III$ and $IV$ are antiaromatic compounds as they satisfy all the conditions of the antiaromatic compound.