Infrared and Raman spectra and normal vibrations of N, N-dimethylthioformamide and N, N-dimethylthioacetamide

摘要: The Raman and infrared spectra of N, N-dimethylthioformamide N-dimethylthioacetamide were recorded the vibrational frequencies are assigned. normal co-ordinate treatment these molecules has been carried out potential energy distributions calculated in order to clarify nature vibrations investigate magnitude mixing up various skeletal frequencies. results regard C-N C=S stretching thioamides compared with those primary secondary on one hand corresponding ordinary tertiary amides other. It shown that force constants general quadratic field type transferable series thioamides. lowest frequency region 150 cm.−1 160 by authors two under consideration. In analysis related molecules, earlier workers only this frequency, but did not record it.