1H-NMR chemical shift assignment of some aldehydes.
| Substance | No. | Structure | δ/ppm |
|---|---|---|---|
| Benzaldehyde | — |
|
10.03 |
| Syringaldehyde | 1 |
|
9.80 |
| Vanillin | 2 |
|
9.79 |
| Propionaldehyde | 3 |
|
9.70 |
| Furfural | 4 |
|
9.65 |
| Coniferyl aldehyde | 5 |
|
9.62; 9.60 |
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