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Among the following.
The set which represents aromatic species is
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The set which represents aromatic species is
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The correct answer is:
I, II and IV
Compounds I, II and IV have continuous
delocalisation of $\pi$-electrons and have $(4 n+2 \pi)$ electrons.
On the other hand compound III does not shows conjugation and compound $\mathrm{V}$ has $4 n \pi$ electrons. Thus, compounds given in only I, II and IV are aromatic.
delocalisation of $\pi$-electrons and have $(4 n+2 \pi)$ electrons.
On the other hand compound III does not shows conjugation and compound $\mathrm{V}$ has $4 n \pi$ electrons. Thus, compounds given in only I, II and IV are aromatic.
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