R | Rh | L | Â | Functional group | References |
---|---|---|---|---|---|
490–620 | C–Br, C–I | Halogen compounds | [29] | ||
– | 610–690 | C–H wagging vibration | w, Vinyl hydrocarbon compounds | [30] | |
700–782 | – | Deformation out-of-plane vibration of the OH groups | w, Benzene derivative | [29] | |
– | 820.76 | – | C–C skeletal vibration | w, Alkane | [30] |
866.21 | – | – | R-NH2 | W, primary amine | [26] |
– | 881.50 | – | C–C skeletal vibration | W, Alkane |  |
925.50 | – | – | OH bending | W,s, carboxylic acid | [31] |
994.83 | – | – | C=C bending | m,s, Alkene |  |
– | 1044.82 | 1049.49 | C–O–C symmetric stretch | St.br, aromatic ethers | [29] |
1052.50 | – | – | CH2 and CH–O–H | m,s Aromatic alcohols | [26] |
– | 1104.33 | – | C–O–C stretching vibration of the | s, Ether group cellulose and hemicellulose | [29] |
– | – | 1195.18 | C–N stretch | w, amine |  |
1201.72 | – | – |  | Phenol hydroxyl | [32] |
– | 1260.69 | – | Ar–O | Alky and aryl ester | [26] |
– | – | 1301.42 | C–N stretch | w, aromatic amine | [33] |
1414.49 | 1409.98 | 1410.51 | C–H in-plane bending coupled with C–C stretching in ring | m, s—Secondary alcohol-free | |
– | 1437.66 | – | –C–H deformation vibration | m, R-CH3; Alkane | [30] |
– | 1528.85 | – | N–H deformation vibrations | W, Secondary amine | [30] |
– | 1606.56 | 1599.37 | C=C conjugated with C=O | S, cyclic alkene, unsaturated ketone | [30] |
1631.6 | – | – | N–H | M, primary amide | [26] |
– | – | 2854.06 | symmetric stretching vibrations of CH2 | m, lipid | |
– | 2922.92 | 2924.52 | Asymmetric stretching vibrations of CH2 | st,s, lipid or alkanes | |
– | 3248.16 | – | N–H stretching vibration | st, br.,proteins and terpenoids | [36] |
3334.53 | – | 3279.25 | bonded (–OH) hydroxyl stretching | st, br., Phenol | [36] |