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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > September  >
In the Laboratory
NMR Analysis of Unknowns: An Introduction to 2D NMR Spectroscopy
David E. Alonso and Steven E. Warren
Department of Chemistry and Biochemistry, Andrews University, Berrien Springs, MI 49104-0430
Cover
September 2005
Vol. 82 No. 9
p. 1385
Abstract
Second-year organic chemistry students analyze and compare the spectral data of three unknown ketones (2-heptanone, 3-heptanone, and 4-heptanone). Students acquire one-dimensional proton and carbon NMR data for each unknown and make signal assignments based on chemical shifts, integration values, and splitting patterns of signals. Difficulties are encountered during interpretation of NMR data for 2- and 3-heptanone. Acquiring and analyzing the two-dimensional NMR spectra of the heptanones resolve these problems.
Supplement
Instructions for the students, including prelab and postlab questions, notes for the instructor, and NMR data for 2-, 3-, and 4-heptanone are available.
*  Contents Folder JCE2005p1385W containing 16 files
*  Download
JCE2005p1385W.pdf

JCE2005p1385W.zip
More Information
*  Citation
 Alonso, David E.; Warren, Steven E. J. Chem. Educ. 2005 82 1385.
*  Keywords
 Hands-On Learning / Manipulatives; Instrumental Methods; Laboratory Instruction; NMR Spectroscopy; Organic Chemistry; Qualitative Analysis; Second-Year Undergraduate
*  History
 Created:
Last Updated:		 August 2, 2005
August 10, 2005
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