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1H NMR studies on thioamides: Barriers to internal rotation

✍ Scribed by J. A. Lepoivre; H. O. Desseyn; F. C. Alderweireldt

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
365 KB
Volume
6
Category
Article
ISSN
0749-1581

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✦ Synopsis

The barrier to the internal rotation of the dirnethylamino group in thioamides of structure R-CS-N(CH,),, R being (CH,),N-CS--, CH,O,C-or N=C--, is studied by proton magnetic resonance, using the lineshape analysis method of Nakagawa. In the solvents o-dichlorobenzene, naphthalene and nitrobenzene all AG# values are in the range of 23 to 24 kcal/mol. I n these solvents the E, and AS+ values of each product are linearly related to the dielectric constants.

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