Hückel's rule

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Science and technology

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What Wikipedia says

In organic chemistry, Hückel's rule predicts that a planar ring molecule will have aromatic properties if it has (4n + 2) π-electrons, where n is a non-negative integer. The quantum mechanical basis for its formulation was first worked out by physical chemist Erich Hückel in 1931.

Excerpt from the Wikipedia article “Hückel's rule”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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