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    (Original post by Vannzzoo)
    Will they mark an annotated mass spec?????
    yeah
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    (Original post by lai812matthew)
    I don't know man but i would said the first one is a quartet of quartets, and the second one is a quartet of triplets (or the other way round i forgot).
    are we meant to include N-H as contributing to the splitting??
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    (Original post by tcameron)
    are we meant to include N-H as contributing to the splitting??
    http://www.chem.ucla.edu/~harding/IG..._doublets.html, yeah we shouldn't be so that would be a quartet
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    (Original post by lai812matthew)
    http://www.chem.ucla.edu/~harding/IG..._doublets.html, yeah we shouldn't be so that would be a quartet
    yeah I didn't think we included them either because they always are classed as singlets in the nmr spectra so didn't think they split other proton environments
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    (Original post by M.Branson98)
    According to wikipedia, it would be called benzyl benzoate.
    Why though..?
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    (Original post by tcameron)
    yeah I didn't think we included them either because they always are classed as singlets in the nmr spectra so didn't think they split other proton environments
    the only hard thing of splitting is CH3-CH2-CH3 which they ask once in this spec only, and never in the last spec i think.
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    (Original post by lai812matthew)
    the only hard thing of splitting is CH3-CH2-CH3 which they ask once in this spec only, and never in the last spec i think.
    that would be a septet or just multiplet
    you'd say it's adjacent to 2xCH3
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    Just like the oxygen shields hydrogen atom in OH to produce a splitting, does Nitrogen to the same for NH2?
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    (Original post by AqsaMx)
    Why though..?
    benzyl alcohol is C6H5CH2OH. don't ask me why though......
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    (Original post by tcameron)
    that would be a septet or just multiplet
    you'd say it's adjacent to 2xCH3
    it would not be in a high resolution NMR.
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    (Original post by lai812matthew)
    it would not be in a high resolution NMR.
    why wouldn't it be?
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    (Original post by KB_97)
    They'll surely tell you the compound is a halogenoalkane then tell you to work out its structure right? There wouldn't be a peak for bromine would there?
    Hopefully
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    (Original post by tcameron)
    why wouldn't it be?
    cuz you take the highest number of neighbouring protons in consideration first. (3) then the one with less number of neighbouring protons (it is again 3). n+1 rule, so it would be a quartet (the one with more protons) of quartets (the one with less protons) i think. my teacher got very angry when he saw the answer allows heptet.

    (p.s. this is not in the spec and you can write heptet !!!!!!)
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    (Original post by RayMasterio)
    Just like the oxygen shields hydrogen atom in OH to produce a splitting, does Nitrogen to the same for NH2?
    Yes as we have an N-H peak
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    (Original post by lai812matthew)
    it would be a quartet of quartets. cuz you take the highest number of neighbouring protons in consideration first. (3) then the one with less number of neighbouring protons (it is still 3). so i think it would be a quartet of quartets. my teacher got very angry when he saw the answer allows heptet.

    (p.s. this is not in the spec and you can write heptet !!!!!!)
    Please, stop making our lives more difficult, most of us find NMR on the spec hard enough lol.
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    (Original post by rory58824)
    Please, stop making our lives more difficult, most of us find NMR on the spec hard enough lol.
    i fear that one day they would not allow this and we will all cry at the exam room
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    (Original post by lai812matthew)
    i fear that one day they would not allow this and we will all cry at the exam room
    pls no
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    (Original post by lai812matthew)
    cuz you take the highest number of neighbouring protons in consideration first. (3) then the one with less number of neighbouring protons (it is again 3). n+1 rule, so it would be a quartet (the one with more protons) of quartets (the one with less protons) i think. my teacher got very angry when he saw the answer allows heptet.

    (p.s. this is not in the spec and you can write heptet !!!!!!)
    not heptet it is a septet - and quartet of quartets is the same as a septet
    you don't even need to be specific - past quartet you can just call it multiplet
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    (Original post by pineneedles)
    Yeah, I got confused about that one when I was doing it, but my teacher said not to worry about the splitting of any benzene peaks, apparently it's higher level than A level.

    Posted from TSR Mobile
    Oh okay, thanks.
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    Will anyone be doing UNOFFICIAL MARKSCHEME tomorow?
 
 
 
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