Isomerization of 5-Vinyl-2-norbornene Using Sodium-coated Catalysts

is prerequisite for the isomerization of VNB to take place. Key Words : Double bond isomerization, 5-Ethylidene-2-norbornene, EPDM rubber, Solid base catalystIntroduction5-Ethylidene-2-norbornene (ENB), a third component of aterpolymer of ethylene, propylene, and diene monomers(EPDM rubber), has been synthesized from the isomeri-zation of 5-vinyl-2-norbornene (VNB), as depicted inScheme 1.