Species, usually transient, derived formally by the @A00045@ of a hydrogen atom from each of two ring atoms of an @A00435@. The name for specific compounds requires the numerical prefix di-. E.g. 1,8-didehydronaphthalene or naphthalene-1,8-diyl.
D01574.png1,2-Didehydroarenes are called @A00465@ and are commonly represented with a formal triple bond.