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    http://filestore.aqa.org.uk/subjects...W-QP-JUN10.PDF

    q3ai

    i don't get how to do this question. What does branched chain mean?
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    Branched chain means it has branches coming off the longest carbon chain.

    I would swap the H from the middle C and the CH3 from the left or the right
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    A five carbon compound that isn't based on pentane.

    (and you can keep your cycles to yourself)
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    (Original post by Hajra Momoniat)
    Branched chain means it has branches coming off the longest carbon chain.

    I would swap the H from the middle C and the CH3 from the left or the right
    I don't get how can i rearrange and move it. Can just move anything anywhere?
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    (Original post by Pigster)
    A five carbon compound that isn't based on pentane.

    (and you can keep your cycles to yourself)
    Oh right so that's all i'm supposed to do?

    I don't get it?? :confused:
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    Have you done optical isomerism, yet?

    If yes: then do what you were taught.

    If no: you can't do it, so wait until you've been taught it.
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    (Original post by Pigster)
    Have you done optical isomerism, yet?

    If yes: then do what you were taught.

    If no: you can't do it, so wait until you've been taught it.
    Yes.

    It's like your left and right hand, arranged so they got the same stuff but it's as if they were flipped in a mirror. A chiral centre is the carbon which has 4 different groups attached to it. Optical isomer can rotate plane polarised light.

    A racemic mixture has equal amounts of optical isomers, this happens due to attack from above and below.

    Enantiomers is another word for optical isomers.
    That's kinda all i remember
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    Well then... draw the branched-chain isomer of 3-bromopentane that shows optical isomerism, i.e. not 2-bromopentane.
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    (Original post by Pigster)
    Well then... draw the branched-chain isomer of 3-bromopentane that shows optical isomerism, i.e. not 2-bromopentane.
    I don't think i'll ever get above 60% in this Chem mock


    ;_________________;
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    (Original post by will'o'wisp)
    I don't think i'll ever get above 60% in this Chem mock


    ;_________________;
    That's the spirit.
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    (Original post by Pigster)
    That's the spirit.
    Reminds me of an inappropriate joke....

    Still i'm doomed almost as doomed for my M2. But my m2 is like 30% better... than my Chem anyway.
 
 
 
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