4octen

4octen is a chemical compound with the molecular formula C8H16. It is an alkene, meaning it contains a carbon-carbon double bond. Specifically, the double bond is located between the fourth and fifth carbon atoms in an eight-carbon chain. This positional isomerism gives it distinct chemical properties compared to other octene isomers.

In its pure form, 4octen is a colorless liquid. Like other alkenes, it can undergo addition reactions across the double bond. Common reactions include hydrogenation, halogenation, and hydration, where hydrogen, halogens, or water, respectively, are added to the carbon atoms involved in the double bond. The reactivity of the double bond is influenced by the surrounding hydrocarbon chain.

4octen can exist as geometric isomers, specifically cis-4-octene and trans-4-octene, due to the restricted rotation around the carbon-carbon double bond. The cis isomer has the alkyl groups on the same side of the double bond, while the trans isomer has them on opposite sides. These isomers have different physical properties such as boiling points and melting points.

The primary production method for 4octen often involves the dimerization of butene or through cracking processes of larger hydrocarbons. It finds applications as a comonomer in the production of certain polymers, modifying their properties. It can also be used as an intermediate in the synthesis of other organic chemicals. Its flammability is a characteristic shared with many low molecular weight hydrocarbons.