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Question
Explain why the following system is not aromatic?
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Solution
For the given compound, the number of π-electrons is eight.
By Huckel’s rule,
4n + 2 = 8
4n = 6
n = `3/2`
For a compound to be aromatic, the value of n must be an integer (n = 0, 1, 2…). Since the value of n is not an integer, the given compound is not aromatic in nature.
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