Table 4.
Functional group frequencies of Datura innoxia and Datura metel leaf and seed methanolic extracts
| FUNCTIONAL GROUPS | DLP-I | DLP-M | DSP-I | DSP-M |
|---|---|---|---|---|
| ALKANES | ||||
| Methylene C-H asymmetric/symmetric stretch | 2925,2854 | 2926,2854 | 2925,2854 | 2925,2854 |
| Methyl C-H asymmetric/symmetric bend, methylene C-H bend | - | - | 1455 | 1457 |
| Cyclohexane ring vibrations | 1049,1020 | 1052 | - | 1053 |
| Skeletal C-C vibrations | 1243,1105, 1049,1020 | 700,779, 893, 922, 1052 | - | 720 |
| Methylene (CH2)n rocking | - | - | - | 720 |
| ALKENE | ||||
| Alkeynyl C=C stretch | 1627 | 1629 | 1628 | 1628 |
| Medial cis or trans C-H stretch | 3011 | - | - | - |
| Vinyl C-H in plane bend | 1411 | 1414 | 1415 | 1416 |
| Vinylidene C-H out of plane bend | - | 893 | - | - |
| AROMATIC | ||||
| Aromatic C-H out of plane bend | - | 893, 779, 700 | 856,815 | - |
| Aromatic C-H in plane bend | - | - | - | 1157,1053 |
| 1,4 disubstitution(para) | - | - | - | 858 |
| ALKYNE | ||||
| Alkyne C-H bend | 670,618 | 618,669 | 618 | - |
| Terminal alkyne | - | 2111 | - | - |
| HALOGEN | ||||
| Fluro compounds (C-F stretching) | 1105,1049, 1020 | 1052,1103 | 1054 | 1053 |
| Bromo compounds (C-Br stretching) | 670,618 | 669 | 618 | 618 |
| Iodo compounds (C-I stretching) | 534 | - | - | - |
| Chloro compounds (C-Cl stretching) | - | 700,779 | 701 | 720 |
| HYDROXYL COMPOUNDS | ||||
| H-bonded OH stretch | 3347 | 3387 | 3278 | - |
| Polymeric OH stretch | 3347 | 3387 | - | 3290 |
| Primary or secondary OH in plane bend | 1322 | 1321 | - | - |
| Phenol or tertiary alcohol, OH bend | - | - | - | 1379 |
| Alcohol, OH out of plane bend | 670,618 | - | - | 720 |
| ETHER | ||||
| Alkyl substituted ether C-O stretch (CO-C) | 1105, 1049 | 1103 | 1054 | - |
| Cyclic ethers large rings C-O stretch | 1105, 1049 | 1103 | - | - |
| Aromatic ethers, aryl O stretch | - | 1245 | - | 1239 |
| AMINO COMPOUNDS | ||||
| Primary amine C-N stretch | 1020 | - | 1054 | 1053 |
| Aliphatic primary amine | - | 3387 | - | - |
| Primary amine NH stretch | - | 1052 | - | - |
| Primary amine NH bend/ secondary amine | - | 1629 | 1628 | 1628 |
| Aliphatic secondary amine NH stretch | 3347 | - | - | - |
| Imino compound | 3347 | - | - | - |
| Secondary amine NH bend | 1627 | - | - | - |
| Secondary amine, CN stretch | - | - | - | 1157 |
| Aromatic primary amine CN stretch | 1322 | 1321 | - | - |
| Aromatic secondary amine | 1322, 1243 | 1321 | - | - |
| Aromatic Tertiary amine | 1322 | 1321 | - | - |
| CARBONYL COMPOUNDS | ||||
| Carboxylate ion | 1322, 1411 | 1414 | 1539 | - |
| Ester | - | - | 1745 | - |
| HETERO-OXY COMPOUNDS | ||||
| organic phosphates (P=O stretch) | 1322 | - | 1238 | - |
| Aliphatic phosphates (P-O-C stretch) | 1049, 1020 | - | - | - |
| Aromatic Phosphates (P-O-C) stretch | - | - | - | 1239 |
| Dialkyl/aryl sulfones | 1322 | - | - | - |
| Organic sulphates | 1411 | - | - | - |
| Organic siloxane/silicone Si-O-Si | 1020 | - | 1054 | 1053 |
| Organic silicone Si-O-C | 1105 | - | - | - |
| THIOLS | ||||
| Open chain azo (-N=N-) | 1627 | 1628 | - | |
| Thiol or thioether CH2-S (C-S stretch), disulfides C-S stretch | - | 701 | - | |
| S-S disulfides | - | 618 | 618 | |
| NITROGEN MULTIPLE COMPOUNDS | ||||
| Cyanate (-OCN and C-OCN stretch) | - | - | 1158 | - |
| INORGANIC IONS | ||||
| Carbonate ion | - | - | 1455 | - |
| Phosphate ion | - | - | 1054 | - |
| Silicate ion | - | - | 1053 |