Question

Among the above, the number of aromatic compound(s) is/are :

Answer 1

(A) is non-aromatic as it is not planar.

(B) is antiaromatic as it contains conjugated system of $4n$ $\pi$ electrons or 2 $\pi$ electrons.

(C) is aromatic as it contains conjugated system of $4n+2$ $\pi$ electrons (2 $\pi$ electrons). It is cyclic and planar.

(D) is non-aromatic as $\pi$ electrons are not fully conjugated.

(E) is aromatic as it contains conjugated system of $4n+2$ $\pi$ electrons (6 $\pi$ electrons). It is cyclic and planar.

(F) is anti aromatic as it contains conjugated system of $4n$ $\pi$ electrons (4 $\pi$ electrons). It is cyclic and planar.

(G) is aromatic as it contains conjugated system of $4n+2$ $\pi$ electrons (6 $\pi$ electrons). It is cyclic and planar.

(H) is aromatic as it contains conjugated system of $4n+2$ $\pi$ electrons (6 $\pi$ electrons). It is cyclic and planar. These are $\pi$ electrons present in one ring. $\pi$ electrons present in other ring are not counted.

(I) is aromatic as it contains conjugated system of $4n+2$ $\pi$ electrons (14 $\pi$ electrons). It is cyclic and planar.

the number of aromatic compound(s) is $5$.