单词	alkene
释义	alkene /ˈalkiːn / noun Chemistry Any of the series of unsaturated hydrocarbons containing a double bond, including ethylene and propene. Alkenes have the general formula: CnH2n. Epoxidation, the conversion of an olefin (an unsaturated alkene hydrocarbon) to a cyclic ether through reaction with hydrogen peroxide, a peracid, or oxygen, is an important chemical technique.... Among the 4800 constituents of tobacco smoke, researchers have identified more than 100 alkanes, 150 alkenes and 55 alicyclic hydrocarbons. The functional group of an alkene is its carbon-carbon double bond. Origin Late 19th century: from alkyl + -ene.
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