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

• Kevin F. Morris ^[1] ; Luther E. Erickson ^[1]
  1. [1] Grinnell College

     Grinnell College

     City of Grinnell, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 73, Nº 5 (May), 1996, págs. 471-473
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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.