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in 1867 as a possible structure for benzene at a time when the structure of benzene was still being debated. The molecule can be described as a hexagon with carbon atoms positioned at the corners, with each carbon connected to its two
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Claus, Adolph K. L. (1867) "Theoretische
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315:(aromatic compounds), p. 315–347, Claus presents Kekulé's hypothetical structure for benzene (
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makes its synthesis impossible. Although it is often referred to alongside
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Hoffmann, R.; Hopf, H. (2008). "Learning from molecules in distress".
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