H–F Coupling constants and hindered internal rotation in NN-dimethyltrifluoroacetamide

Soon Ng

Document Type

Article

Publication Date

1-1-1971

Abstract

The 1H n.m.r. spectra of NN-dimethyltrifluoroacetamide which have been recorded in various solvents, exhibit two H-F coupling constants which are believed to arise from different coupling mechanisms. The high-temperature rotationally averaged spectrum shows that the two H-F coupling constants have the same sign. The activation parameters for the hindered internal rotation about the central C-N bond have been redetermined by line-shape analysis of the temperature-dependent high-resolution 1H n.m.r. spectra.

Keywords

H-F coupling constants, NN-dimethyltrifluoroacetamide

Divisions

CHEMISTRY

Publication Title

Journal of the Chemical Society A: Inorganic, Physical, and Theoretical Chemistry

Publisher

Royal Society of Chemistry

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