ORGANIC CHEMISTRY Chapter 7 e Alkenes are hydrocarbons whose molecules contain the carbon-carbon double bond g alkynes are hydrocarbons whose molecules contain the carbon-carbon triple bond -一 H H CH C-C H H H Ethene(ethylene) opene Alkenes(olefins) H-C≡C-H Ethyne (acetylene) Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 7 Alkenes are hydrocarbons whose molecules contain the carbon-carbon double bond. Alkynes are hydrocarbons whose molecules contain the carbon-carbon triple bond. C C H H H H C C CH3 H H H Ethene (ethylene) Propene Alkenes (olefins) H C C H Ethyne (Acetylene)