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Q.
Which of these cyclopropene systems is aromatic ?
NTA AbhyasNTA Abhyas 2022
Solution:
Non-aromatic as saturated C has sp3 hybridization thus the molecule is non-planar.
It has $4\pi e^{-}$ which can be delocalised. Here, it does not obey Huckel's rule of aromaticity and hence non-aromatic.
Number of pi electrons = 2 and all carbons are sp2 hybridised making the compound planar. Hence, it is an aromatic species.
