Just one sec...
Hey! Sign in to get help with your study questionsNew here? Join for free to post

OCR F324 (Chains, rings and spectroscopy) 28/06/10

Announcements Posted on
At uni or currently applying? Take our short accommodation survey to win one of 5 x £20 Amazon vouchers 25-06-2016
  1. Offline

    Hello, thought I'd start the thread =D.
  2. Offline

    I really got to start learning all them god damn reactions....gonna start revision next week....Anybody already started?
  3. Offline

    I know o.O. Many many reactions.
  4. Offline


    This is probably the exam I'm most worried about at the moment
    I attempted to start revising this morning but I only got as far as aldehydes and ketones before ending up on here lol.
  5. Offline

    It's the synthesis chapter that's the real killer

    We basically need to know the whole organic bit from AS as well in terms of reactions.
  6. Offline

    Has anyone got any useful revision posters/notes/cards for any of the topics in this module.. these normally get me started on revision :P
  7. Offline

    Not yet... well. I have cards, just not on the computer.. we could try to put overviews on here or something =D
  8. Offline

    Yeah that would be good Would help me alot.
  9. Offline

    I've made paper notes that I have already scanned in. I'll try and upload them tomorrow.
  10. Offline

    I'm glad someone has started this thread, anyone got any good reviosion resourses and sites???
  11. Offline

    I'm using a combination of the Heinemann book and the CGP revision guide...find them pretty helpful

  12. Offline

    cgp is awesome.
  13. Offline

    (Original post by skatealexia)
    cgp is awesome.

    Ok, I've now gone through the text book and revision guide for the first module (up to amines) so one down two to go

  14. Offline

    half of second and half of third module to go
  15. Offline

    It's going good so far. It's just a matter of getting your head down and learning it.
  16. Offline

    Still haven't started going through the Analysis module

    Hate that unit
  17. Offline

    chemguide.com is pretty good! Google it because I'm not too sure if that is the exact web address.
  18. Offline

    I've started my revision. Just thought I'd share what I've learnt so far on Benzene:

    Problems with the Kekule structure of benzene:

    1) Low reactivity - C=C present so should react in similar way to alkenes
    - C=C should decolourise Bromine water.
    But this does not happen, does not undergo electrophilic addition, undergoes electrophilic substitution.

    2) Bond length - C-C and C=C have different bond lengths.

    But this is not the case, according to xray studies all C-C bonds are the same, equal length.

    3) Hydrogenation - expected enthalpy change of hydrogenation of benzene is -360kj mol-1, but the actual enthalpy change of hydrogenation of benzene is -208kj mol-1

    >>> Therefore the actual structure of benzene is more stable than kekule's.

    Delocalised model of benzene

    - Trigonal Planar 120 degrees
    - p-orbitals overlap around the whole of the ring forming a system of pie bonds.
    - electron spread all the whole of the ring >>> delocalised >>> more stable.
    - All C-C bonds are identical.

    Nucleophilic substitution

    Nitration of benzene:
    Uses: Dyes and pharmaceuticals.

    Conditions: Conc. H2SO4, conc. HNO3, 50 degrees C

    C6H6 + HNO3 >>> C6H5NO2 + H20

    Halogenation of benzene

    - Only reacts in the presence of a halogen carrier - AlCl3, FeCl3

    Benzene + Halogen >>> Halogenobenzene + Hydrogen Halide

    The mechanisms for the nitration and halogenation of benzene are attached.

    Attached Thumbnails
    Click image for larger version. 

Name:	Nitration of Benzene mechanism.JPG 
Views:	226 
Size:	14.7 KB 
ID:	79050   Click image for larger version. 

Name:	Chlorination of Benzene mechanism.jpg 
Views:	252 
Size:	14.3 KB 
ID:	79051  
  19. Offline

    Some flashcards summarising the spec you guys might find helpful

  20. Offline



Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: November 15, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Which way did you want the referendum to go?

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

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