NMR spectra are usually obtained by dissolving the sample in an appropriate solvent. Because the solvent is present in much higher concentration than the sample, the resonance peaks for the solvent are quite large. The following table shows the chemical shift values for the more common solvents used for 13C NMR spectroscopy.
Solvent |
d (ppm) |
| acetone | 206.0, 24.8 |
| benzene | 128.0 |
| chloroform | 77.0 |
| dimethylsulfoxide | 39.5 |
| dioxane | 66.5 |
| methanol | 49.0 |
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