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NMR Peak Splitting
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Natasha_4902
#1 Posted : Wednesday, June 24, 2020 3:14:16 AM
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Hi,

If there is peak splitting in an NMR, are the split peaks all considered individual peaks, or are several split peaks in one location considered 1 peak? For example, how many peaks would there be in the image for question 85 on page 111 of the Biology 1 EK book?

Thank you
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INSTR_Katerina_102
#2 Posted : Thursday, June 25, 2020 9:04:36 PM
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Hey, good question!

Split NMR peaks are considered to be one signal. For example, the molecule in question 85 is expected to have 3 signals, at the protons in A), B) and D).

It's a bit of splitting hairs as far as language goes though (no pun intended).

I don't envision that they will ask you something like how many peaks a molecule has and the peak splitting will make the difference, usually when they ask how many signals a molecule has they are probing the idea of molecular symmetry, not splitting.

Please let me know if this is unclear!
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