Question

The chemical system that is antiaromatic is
A.
B.
C.
D.

• A. A, B
• B. B, C
• C. A, D
• D. B, D

Answer 1

The correct option is B B, C

For a compound to be aromatic,
(i) It should be cyclic
(ii) It should be planar
(iii) It should have extended conjugation
(iv) It should have (4n+2) $\pi$ electrons

For a compound to be antiaromatic,
(i) It should be cyclic
(ii) It should be planar
(iii) It should have extended conjugation
(iv) It should have (4n) $\pi$ electrons
B and C are antiaromatic in nature as both are cyclic, planar, extended conjugation and have 4$\pi e^{-}.$
A is non-aromatic because it is not planar.
D is aromatic.