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NMR Determination of Internal Rotation Rates and Rotational Energy Barriers: A Physical Chemistry Lab Project

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Kevin F. Morris and Luther E. Erickson

Grinnell College, Grinnell, IA 50112

J. Chem. Educ., 1996, 73 (5), p 471

DOI: 10.1021/ed073p471

Publication Date (Web): May 1, 1996

Section:

History, Education, and Documentation

Abstract

This article describes an experiment suitable for Physical Chemistry laboratories. It consists of an improved method to analyze the kinetics of internal rotation around the C-N amidic bond. The improvement over traditional experiments relies on the use of a saturation transfer NMR technique which allows the expansion of the typically narrow temperature range available in conventional NMR lineshape analysis experiments with dimethylacetamide.

This experiment will expose students to a variety of NMR techniques, such as saturation transfer, inversion-recovery, and lineshape analysis. It will also demonstrate that NMR is an extremely useful tool to chemists, with very relevant applications in physical chemistry.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

NMR Spectroscopy

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Toward the Integration of Liquid- and Solid-State NMR across the Undergraduate Curriculum
N. M. Washton, K. C. Earnheart, D. G. Sykes, M. Ucak-Astarlioglu, and K. T. Mueller
2007 969 (), 20-35
- Toward the Integration of Liquid- and Solid-State NMR across the Undergraduate Curriculum
  N. M. Washton, K. C. Earnheart, D. G. Sykes, M. Ucak-Astarlioglu, and K. T. Mueller
  2007 969 (), 20-35
  This work addresses issues of fundamental reform in the undergraduate chemistry curriculum via advanced integration of liquid- and solid-state nuclear magnetic resonance (NMR) experiments and theory. Our integrated curricula comprises a suite of NMR ...
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