Abstract
Low frequency Raman spectra (10–400 cm −1) in the R( ν )-representation are used to investigate N-ethylformamide in the liquid state. Polarization measurements are performed. Spectra are also obtained of Nd0ethylformamide. The results are compared to similar investigations of formamide, N-methylformamide and N,N-dimethylformamide, acetamide, N-methylacetamide and N,N-dimethylacetamide. A band observed around 100 cm −1 is assigned to vibrations of atoms in intermolecular hydrogen bonds of chain-like species. An approximate description of this mode is given.
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