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    (Original post by reneetaylor)
    So what was the reagent used?
    It was NaBH4 I think, the carboxylic acid bit wasn't reduced in the reaction, just the ketone part.
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    how did people get 63.2? pretty sure most people i spoke to got 63.5 %
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    (Original post by keepontrying)
    yes and splitting patterns and analysed the carbon nmr, I didn't actually say heptet I multiplet for that one but did name others , both are accepted on previous m.s though

    Please tell me I spelt heptet right! lol!

    then you are fixed!


    what was the answer for the monomer third monomer last question

    I got

    if i remember the benzene ring with C-C and i put the double bond oxygen too?
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    (Original post by Gulzar)
    I got something like 63.5 percent for the percentage yield.
    Indeed, I remember get a figure around this ball park. Can anyone remember the masses? Or even better, get the paper up?
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    (Original post by topdoc.)
    how did people get 63.2? pretty sure most people i spoke to got 63.5 %
    well it was 63.15 but correct to 3 sig fig comes to 63.2
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    (Original post by otrivine)
    read the book, they put the benzene what ever reacting with the HNO2+HCL

    http://www.ocr.org.uk/Images/63346-m...me-january.pdf

    evidence for you
    yeah your right they do accept it sorry my bad, i just thought ocr being ocr may be really picky
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    Any unofficial mark scheme going on guys?
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    (Original post by topdoc.)
    how did people get 63.2? pretty sure most people i spoke to got 63.5 %
    I got 63.5
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    I got the right structure but in the stress of the exam I wrote it down wrong in the box put the benzene then ester but stupidly put a H attached to the C(double bond)O ! How annoying! How many marks do you think I will lose? It's usually 2 or 3 for the structure isn't it


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    (Original post by Patel3000)
    yeah your right they do accept it sorry my bad, i just thought ocr being ocr may be really picky
    its fine

    did you get 63.2% ?

    and was your structure with the benzene first and then the ester and the CH(CH3)2
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    (Original post by topdoc.)
    how did people get 63.2? pretty sure most people i spoke to got 63.5 %
    I did too, our issue was miscalculating the MR of compound G... I ****ing hate doing those questions, so easy to mess up.
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    (Original post by JeevenSD)
    It was NaBH4 I think, the carboxylic acid bit wasn't reduced in the reaction, just the ketone part.
    Nice
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    (Original post by otrivine)
    if I remember it came to 63.15 somethign so to 3 sig fig i get 63.2 % ?
    Answer was 63.5/6 (depending on roundings)
    The Mz value for the compound was 174 because 160 + 16 (for extra oxygen) - 2 (for 2 lost hydrogens)
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    (Original post by otrivine)
    Please tell me I spelt heptet right! lol!

    then you are fixed!


    what was the answer for the monomer third monomer last question

    I got

    if i remember the benzene ring with C-C and i put the double bond oxygen too?
    not to sure which question you are reffering to perhaps if you described a bit more please
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    (Original post by OwenL)
    Answer was 63.5/6 (depending on roundings)
    The Mz value for the compound was 174 because 160 + 16 (for extra oxygen) - 2 (for 2 lost hydrogens)
    I got 174

    maybe I put 63.5 , cant remember but I did get 174

    and got two moles and divided them
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    I think I dropped 4 marks in the worst case scenario. Need 85/90.


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    (Original post by otrivine)
    I got 174
    I did too.

    I dropped naming the amino phenol with Bromines on it and the CuI part. Everything else I got right.


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    (Original post by otrivine)
    its fine

    did you get 63.2% ?

    and was your structure with the benzene first and then the ester and the CH(CH3)2
    i think i got 63.5 but i'm not sure

    yeah same for the last one did you the benzne-OOCCH(CH2)3
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    (Original post by OwenL)
    Answer was 63.5/6 (depending on roundings)
    The Mz value for the compound was 174 because 160 + 16 (for extra oxygen) - 2 (for 2 lost hydrogens)
    same! i got 63.5%, i think people didnt realise there was a CH3 on the triangle and mis-calculated. i got 174 for the Mr of G :-)
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    (Original post by GinaS)
    I got the right structure but in the stress of the exam I wrote it down wrong in the box put the benzene then ester but stupidly put a H attached to the C(double bond)O ! How annoying! How many marks do you think I will lose? It's usually 2 or 3 for the structure isn't it


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    I'm afraid so
    I hate to be the bearer of bad news but half of the marks usually come from the structure alone but as long as u showed your working out they will give u the other marks
 
 
 
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