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  4. C 6 H 6 consists of one ring, while naphthlene consists of two rings. Both of them are aromatic and obey the (4 n + 2) rule. Thus the number of n-electrons inside rings of C 6 H 6 and naphthalene are respectively

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Q. $C _{6} H _{6}$ consists of one ring, while naphthlene consists of two rings. Both of them are aromatic and obey the $(4 n +$ 2) rule. Thus the number of n-electrons inside rings of $C _{6} H _{6}$ and naphthalene are respectively

ManipalManipal 2019

Solution:

Benzene, $(4 n+2) n$ electrons
$n =1$ ($\pi$ electrons)
Naphthalene, $(4 n+2) \pi ; n=2,10 \pi$ electrons
Both obey Huckel's rule.