|  | A request that this article title be changed to  Oxepine  is under discussion . Please do not move this article until the discussion is closed. | 
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| Names | |||
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| Preferred IUPAC name Oxepine | |||
| Other names Oxacycloheptatriene | |||
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| Properties | |||
| C6H6O | |||
| Molar mass | 94.113 g·mol−1 | ||
| Related compounds | |||
| Related compounds | Cyclohexene oxide Oxonane | ||
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
Oxepin is an oxygen-containing heterocycle consisting of a seven-membered ring with three double bonds. The parent C6H6O exists as an equilibrium mixture with benzene oxide.
 
 The oxepin–benzene oxide equilibrium is affected by the ring substituents. [1] A related dimethyl derivative exists mainly as the oxepin isomer, an orange liquid. [2]
Oxepin is an intermediate in the oxidation of benzene by the cytochrome P450 (CYP). [3] Other arene oxides are metabolites of the parent arene.
