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Topic: NMR spectra of 3,3-dimethyldipentanoic acid  (Read 4059 times)

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Offline torturedillini

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NMR spectra of 3,3-dimethyldipentanoic acid
« on: April 25, 2009, 01:08:07 AM »
I can't see any of the hydrogens interacting with the hydrogens of any adjacent carbons. So, I think its 3 singlets, but its not a choice. Help please.
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Offline Squirmy

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Re: NMR spectra of 3,3-dimethyldipentanoic acid
« Reply #1 on: April 25, 2009, 02:32:44 AM »
The "dipentanoic acid" part makes me think of more than 3 singlets.

Do you mean 3,3-dimethylglutaric acid?

What are your choices?
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Offline torturedillini

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Re: NMR spectra of 3,3-dimethyldipentanoic acid
« Reply #2 on: April 25, 2009, 04:11:42 AM »
Never mind. There was a none of the above choice. I just didn't notice it.  ::)

Still though, I think there would have been 3 singlets since none of the hydrogens interact with the others. There would be just three because the compound is non-polar, leaving only 3 proton environments. Thanks though.
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Offline polamraju

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Re: NMR spectra of 3,3-dimethyldipentanoic acid
« Reply #3 on: September 13, 2009, 10:28:49 AM »
no, it may have only two singlets since it di pentanoic acid, those acid protons r in same two protons siglet
and two methyl groups attached to 3 rd carbon gives singlet
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Offline bolo

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Re: NMR spectra of 3,3-dimethyldipentanoic acid
« Reply #4 on: September 13, 2009, 04:56:26 PM »
Just 3 singlets. One of them is a broad signal from acid protons (11.7-11.8ppm)

 :rarrow: http://www.sigmaaldrich.com/spectra/fnmr/FNMR010024.PDF
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