Table 6.
Positions of the IR absorption bands in the C. vulgaris and A. platensis carbohydrate complexes.
No. | C. vulgaris | A. platensis | Theoretical Interpretation |
---|---|---|---|
Wavenumber, cm−1 | |||
1 | - | 750–850 | Out-of-plane deformation vibrations of C–H bonds |
2 | 1044 | 1050 | Stretching vibration of C–C |
3 | 1193 | 1190 | Stretching vibration of carbonyl C–O groups |
4 | - | 1200 | Plane deformation vibrations of C–H |
5 | - | 1253 | Stretching vibration of O–H groups |
6 | 1400–1700 | 1400–1650 | Stretching vibrations of C=O, C=C bands, deformation vibrations of NH (δ(N–H)) |
7 | - | 2852 | Symmetrical stretching vibrations of –CH2– (νs(CH2)) |
8 | - | 2925 | Asymmetric stretching vibrations of –CH2– (νas(CH2)) |
9 | 2915,2940 | - | Stretching vibrations of –CH– (ν(CH)) |
10 | 3400 | - | Stretching vibrations of the hydroxyl group |
11 | - | 3735 | Stretching vibrations of N–H (ν(NH)) |