Alkenes are unsaturated hydrocarbons containing a double bond between two carbons. The carbon atom in the alkene is sp2 hybridized. the percentage of s character is less than that of the p character. The characteristic reaction of alkene is the electrophilic addition reaction. Alkene shows cis and trans isomerism.if you want to learn more with details mechanism please visit in this pdf given below. Thank you.
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Fig : Alkene