Alkenes are hydrocarbons are formed only of Carbon and Hydrogen. They are contain a double carbon (C=C) and are often known as unsaturated molecules (for information on saturated molecules visit the alkanes page)
Alkenes can be synthesised using two methods
- Cracking of alkanes
- Dehydration of alcohols
Alkenes undergo many different reactions.
Addition of hydrogen across the double bond
Addition of halogens across the double bond
Addition of water across the double bond
- Opening of the double bond to form a large molecule known as a polymer.