Abstract: Perfluorocyclopropene has been prepared by the dehydrohalogenation of pentafluorocyclopropane and l-chloro-l, 2, 2, 3-tetrafluorocyclopropane and most conveniently by the dehalogenation of 1, 2-dichloro-l, 2, 3, 3-tetra-fluorocyclopropane. Perfluorocyclopropene is a flammable, explosive gas. It is surprisingly stable to many conditions, but reacts with nucleophiles, water, and antimony pentafluoride. A Diels-Alder ...