Alkenes are a class of hydrocarbons that contain only carbon and hydrogens. They are unsaturated compounds that contain at least one carbon-to-carbon double bond. Another term that is often used to de...Alkenes are a class of hydrocarbons that contain only carbon and hydrogens. They are unsaturated compounds that contain at least one carbon-to-carbon double bond. Another term that is often used to describe alkenes is olefins.
