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| style="height:20px; width:75px; text-align:center;" |[[Structural Diagram]]
|[[File:StructuralDiagramEthene.png|center|75px50px]]
|[[File:StructuralDiagramPropene.png|center|100px]]
|[[File:StructuralDiagramBut-1-ene.png|center|125px]]