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    If we want to name this organic molecule: CH3CH2I, is saying 1-iodoethane eligible? Or, we have to say Iodoethane only?

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    The Same thing as only two carbons, dont think it matters as it will always be a 1
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    (Original post by SWEngineer)
    If we want to name this organic molecule: CH3CH2I, is saying 1-iodoethane eligible? Or, we have to say Iodoethane only?

    Thanks.
    What you have here is an example of the redundancy principle.

    The iodine can ONLY go on carbon number 1, therefore the number is redundant and the correct name is iodoethane.

    There are very few exam boards that would penalise you for including the 1- , but it is essentially incorrect according to the IUPAC system.
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    Thanks for your replies.
 
 
 
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