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Spectral data -H NMR and C NMR

  1. Sep 27, 2008 #1
    1. The problem statement, all variables and given/known data

    I'm having a hard time understanding spectral data.
    It says that there is a compund with a sharp IR between 1700 and 1720 cm-1 and a strong broad absorption over the region 2500-3000 cm-1. 1H NMR: 2.49 (t, 2H), 2.80 (t, 2H), 3.72 (s, 3H), 6.78 (d, 2H), 7.11 (d, 2H), 12.40 (s, 1H). 13C NMR: 173.89, 157.57, 132.62, 128.99, 113.55, 54.84, 35.75, 29.20.

    How do you interpret this or is there a place that you can go to on the web to find out what structure you have that I missed?

    2. Relevant equations



    3. The attempt at a solution

    sharp IR between 1700 and 1720 cm-1 (this is a carbonyl C=O of an acid) and a strong broad absorption over the region 2500-3000 cm-1 (this is an O-H group).
     
  2. jcsd
  3. Sep 28, 2008 #2

    chemisttree

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    Yes, and there's that singlet in the 1H NMR spectrum at 12.40 and the 173.89 in the C13. What type of groups absorb at around 7 ppm in 1H? The integration of the 1H gives you how many total protons? How many different types of carbon signals do you have? Look at the ratio of those two (C/H). Notice anything?
     
  4. Sep 28, 2008 #3
    No. I really don't know how to even begin to understand this information. That's all of the information I was given.
     
  5. Sep 29, 2008 #4

    chemisttree

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    You are not going to find the answer in a book or online. The answer requires you to use some gray matter...

    Are you saying that you don't understand this?
     
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