TABLE 3.
Fourier transform infrared spectrometer (FTIR) peaks and their assigned functional groups of methanol root extract of Skimmia anquetilia.
| S. No. | Wavenumber (cm–1) | Compound class | Functional group |
| 1. | 3293.11 | Alcohol | O-H stretching |
| Carboxylic acid | O-H stretching | ||
| Alkyne | C-H stretching | ||
| 2. | 2928.92 | Alcohol | O-H stretching |
| Amine salt | N-H stretching | ||
| Alkane | C-H stretching | ||
| Carboxylic acid | O-H stretching | ||
| 3. | 1706.65 | Aromatic compound | C-H bending |
| Aliphatic ketone | C=O stretching | ||
| Carboxylic acid | C=O stretching | ||
| Conjugated acid | C=O stretching | ||
| Conjugated aldehyde | C=O stretching | ||
| 4. | 1621.05 | Cyclic alkene | C=C stretching |
| Amine | N-H bending | ||
| Conjugated alkene | C=C stretching | ||
| 5. | 1510.84 | Aromatic compound | C=C stretching |
| 6. | 1419.54 | Carboxylic acid | O-H bending |
| Alcohol | O-H bending | ||
| 7. | 1249.07 | Acid | C-O stretching |
| Alkyl aryl ether | C-O stretching | ||
| Amine | C-N stretching | ||
| 8. | 1026.46 | Phosphate ion | PO3 stretching |
| Amine | C-N stretching | ||
| 9. | 926.16 | Alkene | C=H bending |
| 10. | 824.47 | Alkene | C=C bending |
| 11. | 764.63 | Alkene | C=H bending |
| 12. | 704.66 | Alkene | C=C bending |