Introduction Alkenes are hydrocarbon with carbon-carbon double bonds. Alkenes are also called olefins,meaning "oil- forming gas”. The functional group of alkenes is the carbon- carbon double bond,which is reactive. Chapter 7 2 Chapter 7 2 Introduction • Alkenes are hydrocarbon with carbon-carbon double bonds. • Alkenes are also called olefins, meaning “oil￾forming gas”. • The functional group of alkenes is the carbon￾carbon double bond, which is reactive