How Do You Interpret Spectral Data for This Compound?

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In summary, the spectral data provided shows a compound with a sharp IR absorption between 1700 and 1720 cm-1, indicating a carbonyl C=O of an acid group, and a strong broad absorption over the region 2500-3000 cm-1, indicating an O-H group. The 1H NMR spectrum also shows a singlet at 12.40 and the 13C NMR spectrum shows a peak at 173.89, suggesting a carbon-carbon double bond and multiple types of carbon signals. Further analysis and interpretation of these data requires critical thinking rather than simply searching for answers online.
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sciontc03
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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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  • #2
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?
 
  • #3
No. I really don't know how to even begin to understand this information. That's all of the information I was given.
 
  • #4
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.
 

FAQ: How Do You Interpret Spectral Data for This Compound?

What is spectral data?

Spectral data refers to the measurements and analysis of electromagnetic radiation emitted or absorbed by a substance. It is used to determine the chemical and structural properties of a substance.

What is H NMR?

H NMR, or proton nuclear magnetic resonance, is a technique used to determine the hydrogen atoms present in a molecule and their chemical environment. It utilizes the magnetic properties of hydrogen nuclei to generate a spectrum of peaks, which can be analyzed to determine the structure of a molecule.

What is C NMR?

C NMR, or carbon nuclear magnetic resonance, is a technique used to determine the carbon atoms present in a molecule and their chemical environment. It utilizes the magnetic properties of carbon nuclei to generate a spectrum of peaks, which can be analyzed to determine the structure of a molecule.

How is spectral data measured?

Spectral data is measured using specialized instruments such as NMR spectrometers. The substance is placed in a strong magnetic field and exposed to radiofrequency waves, which cause the nuclei to resonate and emit electromagnetic radiation. The emitted or absorbed radiation is then measured and analyzed to generate a spectrum.

What can spectral data tell us about a substance?

Spectral data can provide information about the chemical structure, composition, and purity of a substance. It can also help identify functional groups and determine the number and types of atoms present in a molecule. Additionally, it can be used to study the physical properties and behavior of a substance.

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