Hydrocarbon containing a carbon-carbon double bond. Sometimes called olefin.
Alkenes are valued mainly for addition reactions, in which one of the bonds in the double bond is broken. Each of the carbon atoms in the bond can then attach another atom or group while remaining joined to each other by a single bond.
The ene suffix (ending) indicates an
Alkene or cycloalkene
IUPAC Rules for Alkene and Cycloalkene Nomenclature
ethene common name
2-methylpropene common name
The addition of halogens
requires a catalyst–usually a strong acid, such as sulfuric acid
General reaction mechanism of electrophilic addition
In electrophilic addition reactions, unsymmetrical substituted alkenes give a
Reaction in which only one of two possible orientations of an addition occur