Table 3 FT-IR analysis revealed the presence of functional groups in the Sterculia urens Roxb. root
Frequency range | Band | Band location cm−1 | Band interaction | Band assignments | Possible compounds |
|---|---|---|---|---|---|
800–400 | A, B, C | 529, 546, 576 | Out-of-plane ring bending | C-halogen | Halogen compounds |
D | 631 | Stretch | C–Cl | Alkyl halides | |
E | 763 | Stretch | C–H | Alkenes | |
1100–800 | F | 1063 | Stretch | C–O | Primary alcohol |
1300–1000 | G | 1111 | Stretch | C–H wag | Alkyl halides |
H | 1156 | Stretch | C–O | Tertiary alcohol | |
I | 1280 | Stretch | C–O–C | Aromatic amine | |
1550–1300 | J, K | 1373,1446 | Bend | C–H | Alkanes |
L | 1517 | Bend | NH | Secondary amines | |
1650–1550 | M | 1610 | Stretch | C=C | Alkenes |
2800–2000 | N | 2085 | Bend | C=N | Amide group |
O | 2357 | Stretch | C–O | Carboxylic acid | |
3000–2800 | P | 2852 | Stretch | C–H | Alkane |
Q | 2921 | Stretch | C–H | Alkane | |
3700–3100 | R | 3356 | Stretch | –OH | Alcohol, aldehyde, carboxylic acid |