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Topic: butanol  (Read 3292 times)

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Offline kriggy

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butanol
« on: January 06, 2014, 10:39:57 AM »
Hi guys,
maybe bit stupid question but:
"How many peaks are in NMR spectra of butanol"
CCCCo
I think its 4, 1 for CH3 group, 1 for OH, 1 for the CH2 to which OH bonds and 1 peak for the 2 CH2 groups in the middle.
If we dont count isomers or they didnt mean C NMR.
Am I right?
Thanks
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Offline discodermolide

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Re: butanol
« Reply #1 on: January 06, 2014, 10:53:38 AM »
Are the two CH2 groups in the middle really equivalent?
One is beta to the OH, the other gamma.

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Offline kriggy

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Re: butanol
« Reply #2 on: January 07, 2014, 08:12:37 AM »
Right they are not.
So there are 5 peaks?
I heard somewhere that OH groups are diffucult to see in NMR because of the quick exchange of protons or something like that.. Im not realy sure about interpretng nmr spectra...
Thanks for help
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Offline discodermolide

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Re: butanol
« Reply #3 on: January 07, 2014, 08:25:50 AM »
Usually you can see OH peaks as broad signals. Depending upon the solvent and it's water content they may not be visible.
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