The frequency difference K* of νaNH2 and νfNH/D in thioacetamide and monodeuterothioacetamide gives the approximate degree of coupling in the NH2group. The total effect of coupling being represented by 2K*. A plot of 2K* against the strength of H-bonding (Hs) shows a decreasing degree of coupling with increasing Hs. In 2-aminoacetophenone the difference of the two NH frequencies in various solvents is given by ΔNH2=G+2K*-Hs, where G is the effect of intramolecular H-bonding.
|Number of pages||2|
|Journal||Spectrochimica Acta Part A: Molecular Spectroscopy|
|Publication status||Published - 1979|
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