BRAINCAKENaming Alkenes
Alkenes are named using IUPAC rules. The name ends in the suffix -ene, and the stem shows the number of carbon atoms in the longest chain that contains the C=C (eth-, prop-, but-, pent-, hex-).
From butene onwards the double bond can be in more than one place, so its position is given by a number (a locant). Number the chain from the end nearest the double bond, and quote the lower number of the two C=C carbons, placed just before -ene: but-1-ene is CH2=CHCH2CH3.
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More in Alkenes
- General Formula
- Bonding
- Position Isomerism
- Geometric Isomerism
- Nomenclature (Cahn-Ingold-Prelog)
- Physical Properties of Alkenes
- Combustion
- Electrophiles
All 23 lessons in Alkenes · All AQA AS-level Chemistry topics