ORGANIC CHEMISTRY Chapter 2 o Hydrocarbons are compounds whose molecules contain only carbon and hydrogen atoms o Alkanes: molecules do not have multiple bonds between carbon atoms g Alkenes: molecules have a carbon-carbon double bond o Alkynes: molecules with a carbon-carbon triple bond o aromatic hydrocarbons: molecules contain a special ring Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 2 Hydrocarbons, are compounds whose molecules contain only carbon and hydrogen atoms. Alkanes: molecules do not have multiple bonds between carbon atoms. Alkenes: molecules have a carbon-carbon double bond. Alkynes: molecules with a carbon-carbon triple bond Aromatic hydrocarbons: molecules contain a special ring