Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 820959-17-9, Name is Ac-Beta-Ala-His-Ser-His-OH, molecular formula is C20H28N8O7. In an article, author is GRECH, E,once mentioned of 820959-17-9, Recommanded Product: 820959-17-9.
COUPLING OF NU(NH…N) VIBRATIONS WITH THE GAMMA(NH…N) OVERTONE IN SOLID IMIDAZOLE DERIVATIVES
The IR spectra of a number of imidazole derivatives were studied in the solid state at room and liquid nitrogen temperatures. The bands ascribed to stretching and out-of-plane deformation vibrations of NH groups involved in strong NH…N hydrogen bonds were analysed. The energy of this bond reflected in the position of the nu(NH…N) band changes over a broad range so that it was possible to investigate band shaping due to the overlap with the overtone band of the gamma(NH…N) mode. The correlation between the gamma(NH…N) and nu(NH…) frequencies shows that the gamma(NH…N) value for strong NH…N bridges only slightly depends on nu(NH…N).
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