Proton, Carbon-13 and Nitrogen Chemical Shift Ranges - Nitrogen*
| Group or Class | Range (ppm) |
|---|---|
| Amines, primary: RNH2 | -300 to -380 |
| Amines, secondary: R2NH | -280 to -360 |
| Amines, tertiary: R3N | -330 to -340 |
| Ammonium ions | -270 to -360 |
| Anilinium ions | -310 to -330 |
| Aminophosphines | -280 to -330 |
| Amides | -220 to -270 |
| Isocyanates: RNCO | -320 to -350 |
| Cyanates: ROCN | -190 to -210 |
| Isothiocyanates: RNCS | -260 to -270 |
| Thiocyanates: RSCN | -100 to -200 |
| Nitriles: RCN | -120 to -140 |
| Isonitriles: RNC | -180 to -220 |
| Pyridines | -10 to -220 |
| Imines: RCH=NH | -60 to -80 |
| Nitro compounds: RNO2 | +40 to -30 |
| Azo compounds: R-N=N-R | +180 to +130 |
| Nitrosamines: R2N-N=O | +190 to +130 |
| Nitroso compounds: RN=O | +500 to +400 |
Relative to NO3 - The ranges may be used to approximate both 14N and 15N chemical shifts.
Reference: Silverstein, Bassler and Morrill, Ch. 4 (proton data); Breitmaier and Voelter (carbon-13 data); G.C. Levy and R.L. Lichter, "Nitrogen-15 Nuclear Magnetic Resonance Spectroscopy," Wiley-Interscience, NY, 1979 (nitrogen data).