2. NMR spectroscopy - Integration

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This video explains how integration tells you the number of hydrogen atoms each peak corresponds to. Discussion of how this can be useful in determining structure.

Part of a set of videos giving an introductory course on proton NMR, aimed at around A-level or International Baccalaureate standard. Includes dicussion of integration, chemical shift and coupling.

Category:

Education

Tags:

• proton NMR
• NMR
• nuclear magnetic resonance
• chemical shift
• NMR spectrum
• NMR spectra
• integration
• coupling
• magnetic field
• resonance
• hydrogen
• hydrogen NMR
• splitting
• doublet
• triplet
• regions of spectrum

[flunkUtron]

didnt quite get how you got the 2:3 ratio

[jamesmungall]

@flunkUtron The NMR machine measures the area under the peaks and so can give us these ratios.

[chrarm]

this dude stright up sounds like russel brand LOL

[colinwar]

by looking at molecular structures i am trying to figure out how many different types of hydrogen signals i will see. is there some underlying rule or set of rules that i could apply so as to achieve the correct answer when looking at a variety of different molecular structures. ??? I mean i know that a methyl gives a specific signal but what about another methyl group on the other side of the molecule that isnt necessarilly opposite and symmetrical to the previous methyl group.??

[riccati2012]

Well I just have a casual understanding of quantum mechanics and chemistry and it’s giving me some understanding for sure, great video.

[flunkUtron]

and the 1:3:6 :S

[Tauptu]

I'll just say it for those that fear posting. You are kicking ass here with these videos. i've been studying these for a while now and today watching these I actually clearly understand it.

Thank you, sir!

[ToyletSeat]

thank you for these videos, i'm studying for the MCAT and needed a quick review of NMR.

[peanuts201]

Hello, the last integration *is* in a 1:3:6 ratio. It is the area under the peaks (not their heights) which gives the integration value. Hope that helps.

[vuxpyra]

the last NMR wasnt in a 1:3:6 ratio so how do you find the intergration for that one?