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Q.
Which of the following molecules is least resonance stabilized?
NTA AbhyasNTA Abhyas 2022
Solution:
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.