论文信息 - Far‐infrared spectra of N‐methylacetamide and related compounds and hydrogen‐bond force constants

Far‐infrared spectra of N‐methylacetamide and related compounds and hydrogen‐bond force constants

Far‐infrared spectra of N‐methylacetamide and other monosubstituted amides were measured in the liquid state in the region from 250 to 60 cm.−1. Bands characteristic of the molecules with a peptide bond were found and assigned to the hydrogen‐bond vibration and the CN torsional vibration. Far‐infrared and Raman spectra of crystalline N‐methylacetamide were measured. The normal coordinate treatment for the low‐temperature modification of cystalline N‐methylacetamide was made. A reasonable set of force constants can explain all the spectra and their change due to the modification transition.

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