Accurately and Quickly Interpreting NMR/IR Spectra

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SUMMARY

The discussion centers on the interpretation of NMR and IR spectra for the synthesis of n-bromobutane, specifically using CDCl3 as the IR solvent. The user identified peaks corresponding to CH2 groups and a methyl group in the IR spectrum, confirming the presence of n-bromobutane. In the NMR analysis, the user noted potential shifts in ppm values but maintained confidence in their interpretation. The consensus among participants supports the user's conclusions regarding the spectra analysis.

PREREQUISITES
  • Understanding of IR spectroscopy and peak identification
  • Familiarity with NMR spectroscopy and chemical shift interpretation
  • Knowledge of organic compounds, specifically n-bromobutane
  • Experience with using CDCl3 as a solvent in spectroscopy
NEXT STEPS
  • Study the principles of IR spectroscopy and peak analysis
  • Learn about NMR chemical shifts and their significance in organic chemistry
  • Research the synthesis and properties of n-bromobutane
  • Explore best practices for using CDCl3 in NMR and IR spectroscopy
USEFUL FOR

Chemists, organic chemistry students, and researchers involved in spectral analysis and compound identification will benefit from this discussion.

biochem850
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In examining the IR spectrum, I noted that there were peaks for CH2-x where x is bromine, methylene (2 peaks) and a peak corresponding to a methyl group; I concluded that I've synthesized n-bromobutane. Is the method I used to interpret my spectra sound? *CDCl3 was the IR solvent

In addition, in looking at the HNMR spectra, I concluded that the protons shown in the NMR spectra corresponded to the groups determined in the IR spectra. My only concern is that the approximate ppm(s) seem to be shifted yet I know that this may not necessarily mean that my interpretation is wrong. Can someone confirm that my logic is sound and supported?

I've attached the NMR and the IR. http://i42.photobucket.com/albums/e309/Alex_Jsoh/IRSpectrum-page-001_zps084bb818.jpg

http://i42.photobucket.com/albums/e309/Alex_Jsoh/NMRSpectrum-page-001_zpsdd2a7edc.jpg

Thanks!
 
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What is n-bromobutane?
 
I'm sorry, 1-bromobutane (or n-butyl bromide).
 
Is the rightmost small peak CDCL3? Maybe you should set it to 0?
If so then it works well with the 1-bromobutane.
 
Can't really see your IR spectrum very clearly, but it does look similar to the reference IR spectrum for 1-bromobutane.
n-bromobutane.gif
 
Yeah, someone else did the IR/NMR for me.

The smallest peak is CDCl3 and it seems that setting it to 0 is prudent.

I did some thorough review of NMR/IR and I'm pretty confident now!

Thanks guys!
 

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