Table 2.
Functional groups present in fractions of T. stans.
| Wave numbers (cm−1) | Y (%T) | Bond | Assignments |
|---|---|---|---|
| Hydro fraction | |||
| 3339.06 | 50.56 | O-H stretch, H bonded | Alcohols, phenols |
| 2107.17 | 95.75 | C≡C stretch | Alkynes |
| 1634.45 | 70.36 | C=O stretch | Carbonyls (general), α, β-unsaturated aldehydes, ketones |
| 422.82 | 31.11 | Unknown | Unknown |
| 414.57 | 31.14 | Unknown | Unknown |
| Ethyl acetate fraction | |||
| 3373.96 | 90.79 | O-H stretch, H-bonded | Alcohols, phenols |
| 2926.73 | 80.64 | O-H stretch | Carboxylic acids |
| 2872.58 | 87.17 | N-H stretch | 1°, 2° amines, amides |
| 1726.16 | 89.32 | C=O stretch | α,β-aldehydes, ketones, saturated aliphatic acids |
| 1655.64 | 89.42 | C=C stretch | Alkenes |
| 1457.11 | 88.34 | C-H bend | Alkanes |
| 1377.97 | 88.37 | Unknown | Unknown |
| 1215.54 | 85.51 | C-H wag | Alkyl halides |
| 1153.59 | 83.07 | C-O stretch | Alcohols, carboxylic acids, esters, ethers |
| 837.67 | 91.50 | C-Cl stretch | Alkyl halides |
| 773.57 | 92.13 | C-Cl stretch | Alkyl halides |
| 556.54 | 90.63 | C-Br stretch | Alkyl halides |
| Methanol fraction | |||
| 3307.47 | 70.71 | O-H stretch, free hydroxyl | Alcohols, phenols |
| 2941.5 | 78.95 | O-H stretch | Carboxylic acids |
| 2833.47 | 82.61 | C-H stretch | Alkanes |
| 1710.79 | 87.57 | C=O stretch | α.β-unsaturated aldehydes, ketones. |
| 1603.41 | 69.06 | C-C stretch (in ring) | Aromatics |
| 1515.94 | 87.45 | N-O asymmetric stretch | Nitro compounds |
| 1382.69 | 71.15 | C-H rock | Alkanes |
| 1256.46 | 75.39 | C-N stretch | Aliphatic amines |
| 1019.30 | 27.61 | C-O stretch | Alcohols, carboxylic acids, esters, ethers. |
| 513.59 | 52.92 | C-Br stretch | Alkyl halides |