Alkene
Structural isomerism

Alkenes having four or more carbon atoms can form diverse structural isomers. Most alkenes are also isomers of cycloalkanes. Acyclic alkene structural isomers with only one double bond follow:

Many of these molecules exhibit cis – trans isomerism. There may also be chiral carbon atoms particularly within the larger molecules (from C). The number of potential isomers increases rapidly with additional carbon atoms.
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