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Skeletal formula Ball-and-stick model
CAS number 291-70-3 YesY
PubChem 6451477
ChemSpider 4953942
Jmol-3D images Image 1
Molecular formula C6H6O
Molar mass 94.11 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Oxepin is an oxygen-containing heterocycle consisting of a seven-membered ring with three double bonds. It exists as an equilibrium mixture with benzene oxide. The oxepin-benzene oxide system has fluctuating bonds in which the equilibrium can be shifted to one extreme or the other by suitable substituents.[1] This compound is not aromatic.

Oxepin-benzene oxide equilibrium


  1. ^ E. Vogel and H. Günther (1967). "Benzene Oxide-Oxepin Valence Tautomerism". Angewandte Chemie International Edition in English 6 (5): 385–401. doi:10.1002/anie.196703851.