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Peaks and bands identified in the BL spectrum.
| Wavenumber (cm−1) | Assignment |
|---|---|
| 935 | C-H out of plan |
| 1036–1118 | C-O deformation from primary alcohols |
| 1185 | C-O vibration plus C=O and C-C from guaianyl and syringyl cores |
| 1408 | in-plane deformation of OH |
| 1554 | C-H vibration |
| 1643 | The vibration of the aromatic nucleus plus the C=O stretch |
| 2329 | C-H stretching from methyl and methylene groups |
| 3340 | O-H stretching from phenols, alcohols, and water |
