Alkene A 3D model of ethylene, the simplest alkene In organic chemistry, an alkene, or olefin, is a hydrocarbon containing a carbon –carbon double bond. [1] The double bond may be internal or at the terminal position. Terminal alkenes are also known as α-olefins.
An alkene is a hydrocarbon that contains at least one carbon-carbon double bond. That double bond is what defines the entire class of molecules and drives nearly everything interesting about them, from how they react in a lab to how they ripen the fruit on your counter.
Although there is only one alkene with the formula C 2 H 4 (ethene) and only one with the formula C 3 H 6 (propene), there are several alkenes with the formula C 4 H 8.
To name an alkene (a pure alkene, without any other functional groups), we first identify the parent, which is the longest chain that contains the C=C double bond.
So, the more electron-donating alkyl groups on the C=C carbon atoms, the more stable the alkene. Therefore, we have this pattern of stability: Tetrasubstituted > Trisubstituted > Disubstituted > Monosubstituted.
An alkene refers to a class of unsaturated hydrocarbons that contain at least one carbon-carbon double bond. They fit into the group of organic compounds called unsaturated hydrocarbons and are sometimes called olefins.
Alkenes are unsaturated hydrocarbons containing carbon-carbon double bonds. The general formula of an alkene is CnH2n.
The vitamin A precursor found in both spinach and bell peppers is beta-carotene, an alkene. Beta-carotene consists of a long carbon chain with multiple double bonds with a substituted cyclohexene at each end.