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  4. Which one of the following compounds is aromatic in nature ?

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Q. Which one of the following compounds is aromatic in nature ?

JEE MainJEE Main 2021Organic Chemistry – Some Basic Principles and Techniques

Solution:

(1) (Acenaphthene)
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$\rightarrow 10 \pi e ^{-}$in cyclic conjugation
$\rightarrow $ Aromatic
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$4 \pi e ^{-}$in ring conjugation
$\Rightarrow $ Anti Aromatic
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$4 \pi e ^{-}$in ring conjugation
$\Rightarrow $ Antiaromatic
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