How Do You Interpret Spectral Data for This Compound?

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The discussion centers on interpreting spectral data for a compound, highlighting key features in IR and NMR spectra. A sharp IR peak between 1700-1720 cm-1 indicates a carbonyl group, likely from an acid, while a broad absorption from 2500-3000 cm-1 suggests an O-H group. The 1H NMR spectrum shows various chemical shifts, including a singlet at 12.40, which corresponds to an acidic proton. Participants emphasize the importance of analyzing the integration and ratios of protons to carbon signals to deduce structural information. Overall, the thread illustrates the complexity of spectral interpretation and the need for critical thinking in organic chemistry analysis.
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Homework Statement



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?

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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).
 
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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?
 
No. I really don't know how to even begin to understand this information. That's all of the information I was given.
 
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?
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.
 
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