Turn on thread page Beta

POST-EXAM CHAT: OCR Chemistry- Rings, Polymers and Analysis - F324 thread watch

    Offline

    17
    ReputationRep:
    (Original post by _Andrew_)
    I think there was two, one at the start about bromination of the different compounds, and also for the NMR question.
    Ah right. Bit odd to put a communication mark for the NMR spectrum.
    Offline

    1
    ReputationRep:
    (Original post by JordanCarroll)
    the sequence was valine, glycine, and leucine?

    Yay, thats what I got:yep:
    Offline

    4
    ReputationRep:
    (Original post by Noble.)
    I said NaBH4 for whichever one had the benzoic acid, I can't remember the order.
    ahh you porn star! absolute genious!
    Offline

    1
    ReputationRep:
    (Original post by JordanCarroll)
    The NMR spec was SO easy! i was expecting a real hard interpretation of IR, MS, and protonNMR,
    i feel like full marks up until the last 3 pages tbh lol

    It wasn't that easy
    Offline

    21
    ReputationRep:
    (Original post by Noble.)
    Ah right. Bit odd to put a communication mark for the NMR spectrum.
    Nah, it was quite common on the past papers.

    It was mostly for using 2 or more words correctly out of singlet/doublet/triplet/chemical shift and a couple more.
    Offline

    17
    ReputationRep:
    (Original post by _Andrew_)
    It wasn't that easy
    The most difficult part was probably working out that the multiplet had 7 peaks and not 5. Having said that it's almost impossible for it to have a peak of five.
    Offline

    2
    ReputationRep:
    (Original post by _Andrew_)
    Yay, thats what I got:yep:
    *phew* sweet :p:
    the NMR wasnt so bad though? :p: 3 esters, one was just not it as it had to many enviroments,
    and to sort out the other two, just had to check whether CH3-O was on the alcohol or acid side,

    after that you had to write some long explanation about delta values and splitting though :sigh:
    Offline

    2
    ReputationRep:
    (Original post by monkey01)
    and the anhydride question
    i put the anhydride reacts with this, i think it was...

    Offline

    17
    ReputationRep:
    (Original post by JordanCarroll)
    i put the anhydride reacts with this, i think it was...

    Yep, that's exactly what I put as well. Plus ethanoic acid is formed in the reaction as well.
    Offline

    1
    ReputationRep:
    Yeah I put that structure, too.

    I'm so sure ive done ****
    Offline

    11
    ReputationRep:
    I doubt they'll want ethanoic acid though, since it was 1 mark and they asked what the anhydride reacted with to form Compound X.
    Offline

    17
    ReputationRep:
    (Original post by TwilightKnight)
    I doubt they'll want ethanoic acid though, since it was 1 mark and they asked what the anhydride reacted with to form Compound X.
    I just put it anyway, I don't like leaving something out of the answer when it's correct.
    Offline

    0
    ReputationRep:
    loved the paper but the last question was a son of a mother. new spec harder than old 1, just hope grade boundaries are sweet.
    Offline

    1
    ReputationRep:
    (Original post by Noble.)
    The most difficult part was probably working out that the multiplet had 7 peaks and not 5. Having said that it's almost impossible for it to have a peak of five.
    OMG me too, i was like wtf, no no no, and then i looked at the compounds and was like no way could it be 5 has to be 7
    Offline

    2
    ReputationRep:
    this is the structure of the impurity?(so bored in school)

    Offline

    1
    ReputationRep:
    (Original post by daryan)
    loved the paper but the last question was a son of a mother. new spec harder than old 1, just hope grade boundaries are sweet.
    Exactly, just like the june module last year. The past exam papers were nothing compared to the new one.
    Offline

    2
    ReputationRep:
    (Original post by daryan)
    loved the paper but the last question was a son of a mother. new spec harder than old 1, just hope grade boundaries are sweet.
    agreed. hope i get some pity marks on the last two pages :p:
    Offline

    17
    ReputationRep:
    (Original post by JordanCarroll)
    this is the structure of the impurity?(so bored in school)

    I think it's substitution of the ethanoic acid with the other hydrogen on the amine to produce a tertiary amine. Because the OH group in phenol is 'acidic' so it isn't going to react with ethanoic acid.
    Offline

    2
    ReputationRep:
    (Original post by Noble.)
    I think it's substitution of the ethanoic acid with the other hydrogen on the amine to produce a tertiary amine. Because the OH group in phenol is 'acidic' so it isn't going to react with ethanoic acid.
    ahhh!!
    ****.
    :p:
    Offline

    7
    ReputationRep:
    (Original post by CertifiedAngel)
    Exactly, just like the june module last year. The past exam papers were nothing compared to the new one.
    I agree, i'd say, considering we are the first year of the new A2 spec, that they will have to give some sort of consideration to the fact that we have no relevent past paper materials.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: February 2, 2010
The home of Results and Clearing

2,978

people online now

1,567,000

students helped last year

University open days

  1. Sheffield Hallam University
    City Campus Undergraduate
    Tue, 21 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 22 Aug '18
  3. University of Buckingham
    Postgraduate Open Evening Postgraduate
    Thu, 23 Aug '18
Poll
How are you feeling about GCSE results day?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.