Alkene nomenclature | Alkenes and alkynes | Organic chemistry | Khan Academy

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We can name an alkene using the following steps: (1) Identify the longest carbon chain containing the double bond. (2) Number the carbons, ensuring the double bond gets the lowest possible number. (3) Include the double bond location as a prefix to the root name. (4) Add any substituents as prefixes, in alphabetical order if needed. (5) Use the "-ene" suffix to indicate the molecule is an alkene.

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