Dienes are organic compounds that contain two double bonds between carbon atoms. They can be classified into two main types: conjugated dienes, where the double bonds are separated by a single bond, and isolated dienes, where the double bonds are separated by more than one single bond. Dienes play a significant role in various chemical reactions, including polymerization and addition reactions. One common example of a diene is butadiene, which is used in the production of synthetic rubber. Dienes are important in organic chemistry and are often studied for their unique reactivity and ability to form complex structures. Their presence in various natural and synthetic compounds makes them essential in many industrial applications.