OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD

What parts of the theory side of NMR could come up as a question? (Just wondering which parts to revise)

TMS and the solvent CDCl3
Best to know the structure of TMS as well
Radiowaves, might want to know about the magnetic spin and why some elements can't be used in NMR

Great, thanks!

remember TMS is.. the standard for chemical shift measurements

guys its a pm exam right?


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TMS and the solvent CDCl3
Best to know the structure of TMS as well
Radiowaves, might want to know about the magnetic spin and why some elements can't be used in NMR

Left all my revision until now. I have one day to revise for unit 4. Hopefully i can get at least a D -_-

why cant some elements be used?


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tips for nmr?
how do u appraoch it?

Annotate the spectrum that they give you! Think carefully about what the compound is e.g.
How many proton environments are there? - Integration of 6 = 2 x CH3
Is there a mess at 7ppm? - Benzene

I would recommend printing off every NMR question from our spec and just work through them. The only way i figured out NMR is by practice and experience!!

I'm going to do NMR like this
Peak at 0.8 ppm due to R-CH
Triplet: adjacent to CH2
Peak area of 3: CH3
-CH2CH3

Definition of spin-spin coupling: When the hydrogens attached to on carbon influence the hydrogens on the adjacent carbon atoms. This gives rise to the splitting patterns on the NMR spectrum.

Annotate the spectrum that they give you! Think carefully about what the compound is e.g.
How many proton environments are there? - Integration of 6 = 2 x CH3
Is there a mess at 7ppm? - Benzene

I would recommend printing off every NMR question from our spec and just work through them. The only way i figured out NMR is by practice and experience!!

would we need to know this definition?