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Topic: H NMR spectroscopy  (Read 3924 times)

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bryct

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H NMR spectroscopy
« on: November 30, 2005, 06:06:55 PM »
Hello there,

can anyone tell me how many H NMR signals o-toluic acid should have?  I performed an HNMR spec analysis on my sample but it looks wrong.  I thought there should be 4 signals but I only have 3. If I'm wrong, please correct me, or is my analysis just off?
« Last Edit: November 30, 2005, 06:14:42 PM by bryct »
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Offline Winga

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Re:H NMR spectroscopy
« Reply #1 on: November 30, 2005, 08:09:31 PM »
If the NMR spectrometer is low in operating frequency, the resolution will be poor, it can't separate the peaks which are closed in chemical shift.

3 signals:

1. 3 methyl protons
2. a carboxylic proton
3. 4 aromatic protons (their peaks are merged together)
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Offline Hima Potturi

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Re:H NMR spectroscopy
« Reply #2 on: December 02, 2005, 12:06:21 AM »
You can calculate the integration numbers to see how many protons are showing up in each region
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