Vinyl norbornene
Vinyl norbornene is an organic compound that consists of a vinyl group attached to norbornene. It is a colorless liquid. The compound exists as endo and exo isomers, but these are not typically separated. It is an intermediate in the production of the commercial polymer EPDM. It is prepared by the Diels–Alder reaction of butadiene and cyclopentadiene.
Image:RouteToEthylidenenorbornene.svg|thumb|left|332px|Vinyl norbornene is an intermediate in the production ethylidene norbornene.