Some known alkenes The preparation of cyclohexene: video The preparation of alkenes Addition reactions on alkenes Hydrogenation of alkenes: Margarine Electrophilic addition of chlorhydric acid on propene (mechanism) Electrophilic addition of bromine on ethyne (video) Electrophilic addition of bromine on ethene (mecanism) The oxidations of alkenes Radical polymerisation of styrene (video) Radical polymerisation of alkenes Important polymers of alkenes Alkenes: Exercises