different between epoxide vs oxepin

English

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

epoxide (plural epoxides)

(organic chemistry) Any of a class of organic compound, cyclic ethers, having a three-membered ring; they are prepared by the selective oxidation of alkenes or by ring-closure of halohydrins; used to make plastics.
(organic chemistry) Any similar compound in which an ether linkage has been made across a larger ring.

oxepin (plural oxepins)

(organic chemistry) The unsaturated seven-membered heterocycle containing six carbon atoms, one oxygen atom and three double bonds; it is tautomeric with the epoxide benzene oxide

According to the standard nomenclature for heterocyclic compounds, it should really be oxepine

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