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    I was wondering how I derive a monomer from it's corresponding polymer, given the process (addition), this is one of them I'm struggling with.



    This is the repeat unit of the addition polymer, I seem to think the monomer is (CH3)2-C=CH2

    But it apparently it is H2C=CHCH3

    Thanks,
    Sek.
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    Its H2C=C(CH3)2
    Isn't it? It should be
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    Id agree with you personally. Im not quite sure what theyve done there.
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    (Original post by Sekonda)
    I was wondering how I derive a monomer from it's corresponding polymer, given the process (addition), this is one of them I'm struggling with.



    This is the repeat unit of the addition polymer, I seem to think the monomer is (CH3)2-C=CH2

    But it apparently it is H2C=CHCH3
    Thanks,
    Sek.
    It doesnt seem right, if there was just one methyl group on the monomer H2C=CHCH3, then there wold be just one methyl group in a repeat unit. So it looks like you are right? :confused:
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    (Original post by Sekonda)
    I was wondering how I derive a monomer from it's corresponding polymer, given the process (addition), this is one of them I'm struggling with.



    This is the repeat unit of the addition polymer, I seem to think the monomer is (CH3)2-C=CH2

    But it apparently it is H2C=CHCH3

    Thanks,
    Sek.
    As you have correctly identified, the formula of the monomer has to be the same as that of the polymer unit plus 1 double bond to make up the valency of carbon.

    The mark scheme is wrong.
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    Thanks guys, I usually just assume the chemists who write the OCR chemistry books are right, but they were bound to make a silly error like with most mark schemes here and there.

    Thanks for the clarification!
    Sek.
 
 
 
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