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Explain Why the Following Systems Are Not Aromatic? - CBSE (Science) Class 11 - Chemistry

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Question

Explain why the following systems are not aromatic?

Solution 1

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 must be an integer (= 0, 1, 2…), which is not true for the given compound. Hence, it is not aromatic in nature.

Solution 2

Due to the presence of a sp3 -carbon, the system is not planar. Further,it contains only four n-electrons, therefore, the system is not aromatic because it does not contain planar cyclic cloud having (4n + 2) n-electrons.

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Solution Explain Why the Following Systems Are Not Aromatic? Concept: Aromatic Hydrocarbons - Aromaticity.
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