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Question
Explain why the following system is not aromatic?
Answer in Brief
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Solution
For the given compound, the number of π-electrons is four.
By Huckel’s rule,
4n + 2 = 4
4n = 2
n = 1/2
For a compound to be aromatic, the value of n must be an integer (n = 0, 1, 2…), which is not true for the given compound. Hence, it is not aromatic in nature.
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Aromatic Hydrocarbons - Aromaticity (Huckel Rule)
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| (ii) |  |
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