Why do the names ethene and propene not include the position of the double bond?

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  • 3 months ago

    There is only one possible position for the double bond.

    Ethene ....... H2C=CH2

    Propene ..... H3C−CH=CH2

    If you rotate H2C=CH-CH3 then you get H3C−CH=CH2 .... It's the same thing whether you look at it from the front or the back.

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