Proton NMR Spectroscopy (A-level IB Chemistry)
Outlining H NMR spectroscopy. How proton NMR spectroscopy works and its use in analysing organic molecules is shown, with examples given including methanol, propane and propan-1-ol. The use of tetramethylsilane (TMS) as an organic solvent for NMR and the use of chemical shift ppm data is linked to the theory behind NMR spectroscopy. Deuterated solvents, such as CDCl3 and heavy water (D2O) are shown, including the missing peaks for OH and NH bond environments when samples are mixed with D2O.
For AQA, OCR (A), Edexcel and CIE.
Data table NMR values used and shown are taken from AQA data booklet (7405).
Hydrogen Environments: 01:21
Hydrogen-1 and Spin: 03:23
Resonance: 05:20
Tetramethylsilane (TMS) Standard: 07:41
Chemical Shift (ppm) and Spectras: 08:39
Example - Methanol: 09:40
Deuterated Solvents: 11:20
Integration Ratios: 12:51
Example - Propane: 13:12
Data Tables: 14:23
Example - Propan-1-ol: 15:19
Summary: 17:37
NMR Examples in the video:
Methanol (Peak location): 09:40
Propane (Integration Ratios): 13:12
Propan-1-ol (Full spectra): 15:19
Pages on chemistrystudent.com:
www.chemistrystudent.com/NMRS...
Relevant Videos:Carbon NMR Spectroscopy - • Carbon-13 NMR Spectros...
Peak Splitting (High Resolution H-NMR) -
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Пікірлер: 8
This actually just saved my life...
Hey, just wanted to say you are amazing! I looked through all the other related videos and none of them explained why shielding/anti-shielding requires less/more radio frequency to flip the spin of the nucleus! Thank you so much!
@chemistry.student
10 ай бұрын
Thank you! Glad it helped explain :)
@user-lb5ku4ln1c
7 ай бұрын
I agree! So helpful!!!! I actually understand the topic now!
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Hi, the frequencys change ? cus we have been told that the f is constant but the magnetic field varies??
@chemistry.student
7 ай бұрын
NMR spectrometers can work in both ways - some machines alter the frequency and keep a constant external magnetic field (B0) and others change the external magnetic field and apply a constant frequency. Both methods give the same results in terms of patterns observed in spectra. At this level however I think the frequency changing is easier for students to visualise and I believe it is now generally more common for NMR spectrometers to have a constant magnetic field and altering frequencies. Hope that helps :)
@louisWT91
7 ай бұрын
@@chemistry.student ahhh thank you so much :>