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Determination of the anharmonic force constant Ksδδ of the amino group of trifluoroethylamine in 1:1 complexes with bases

✍ Scribed by Jose Fernandez Bertran; Boris la Serna Torres

Book ID: 103905568
Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 232 KB
Volume: 40
Category: Article
ISSN: 1386-1425
DOI: 10.1016/0584-8539(84)80124-5

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✦ Synopsis

The Fermi coupling coefficient W which measures the intensity of the resonance interaction and is proportional to the anharmonic force constant K,, of the amino group, is measured by two independent methods in 1: 1 complexes of trifluoroethylamine with bases in dilute CCI, solutions. Values of W from the intensity ratio of Fermi doublet components R, are in good agreement with more precise calculation based on frequencies ys, v,and 26 of the protio species (NH,) and vrv,of the monodeutero species (NHD). There is a large sensitivity of W to the pKB of the base but there is no appreciable temperature dependence.

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