July 07, 2022, 04:11:09 AM
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Topic: Why does my amide N-H peak show as a sharp doublet?  (Read 244 times)

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Offline tombarret

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Why does my amide N-H peak show as a sharp doublet?
« on: April 19, 2022, 11:04:54 AM »
Here is an NMR of the shown molecule. The peak on the very left at 7.42 is the N-H peak in the amide bond.
Can someone explain why this appears so sharply and well defined also why is it a doublet?
Thank you!

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Offline Babcock_Hall

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Re: Why does my amide N-H peak show as a sharp doublet?
« Reply #1 on: April 19, 2022, 12:28:34 PM »
Do you have a vicinal hydrogen atom?

Offline Orcio_87

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Re: Why does my amide N-H peak show as a sharp doublet?
« Reply #2 on: April 20, 2022, 10:24:23 AM »
As of peak sharpness - I heard it is correlated with the rate of H at N-H exchange. As of doublet - adjacent H atom splits the signal into two.

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