PENTENES

" each of a number of isomeric liquid alkenes with the formula c₅ h₁₀; especially either of the straight-chain isomers ch₂ =ch(ch₂)₂ ch₃ (""1-pentene"") or ch₃ ch=ch(ch₂)ch₃ (""2-pentene""). compare ""amylene"", pentylene.

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