An unsaturated, cyclic hydrocarbon with a structure similar to benzene, in which one of the double bonds is replaced by a triple bond. It may be prepared from benzenediazonium-2-carboxylate or from isatoic anhydride.
Definition
A short-lived
intermediate present in some reactions.
The ring of six carbon atoms contains two
double bonds and one triple bond (the systematic
name is 1,2-didehydrobenzene).
