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Topic: NMR protons lost :D  (Read 2727 times)

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Offline Alexander

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NMR protons lost :D
« on: April 23, 2010, 10:01:46 AM »
So, here is the situation:
I have NMR spectra of diamine in Methanol d4; and the amine protons are lost. I was told that this is not unusual, since there is a proton exchange. Also I was told to try DMSO as a solvent. but the problem is, hat I don´t have it.
Will the same proton exchange take place in D2O?
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Offline MissPhosgene

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Re: NMR protons lost :D
« Reply #1 on: April 23, 2010, 10:12:52 AM »
It is most likely that you will not see the amine protons in D2O.

Is the product soluble in CDCl3?

You can also try another spectroscopic technique to verify that the amine is present.
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Offline democanarchis

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Re: NMR protons lost :D
« Reply #2 on: April 23, 2010, 02:02:41 PM »
H/D exchange is very fast in D2O, if you use CDCl3 or MeOD with a drop of D2O you should be able to see it
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