Doubt from resonance

Question no 46

3 ?

Yes but which of them please tell


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@sneha i think it should be 2,3 and 5
In 3 there is vacant orbital of B and hence even 3 is anti aromatic

their will be conjugation in 3rd sir but not to dominant as in last sir question says
which r not stable by resonance @Shwetanshu_2018 bro..

@Sneha_2021 it says , which all are destabilised due to conjugation .
So in 3rd there it will becomes anti aromatic

And for 6th , there is no conjugation because it isn’t a planar molecule , it is a non aromatic compound because of loss of planarity


nice observation i forget that point.. u r correct..

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