City of Grinnell, Estados Unidos
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.
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