Which of the following molecules is least resonance stabilized?

Question

Which of the following molecules is least resonance stabilized? (A) Option 1

(B)

(C)

(D)

Tardigrade Admin · Accepted Answer

In A,B,D entire ring involved in delocalisation and follow huckel rule of (4n+2)pi electrons. so, they are aromatic and are more stable.
While in C one carbon is sp³ so non planar. so, non aromatic and it is less stable.

Q. Which of the following molecules is least resonance stabilized?

In A,B,D entire ring involved in delocalisation and follow huckel rule of (4n+2)pi electrons. so, they are aromatic and are more stable. While in C one carbon is sp3 so non planar. so, non aromatic and it is less stable.

In A,B,D entire ring involved in delocalisation and follow huckel rule of (4n+2)pi electrons. so, they are aromatic and are more stable.
While in C one carbon is sp³ so non planar. so, non aromatic and it is less stable.