liquid NH3 at 25°C = 0 ppm
All chemical shifts given in ppm!
Source: Bruker Almanac 2012
| Type | chemical shift range |
|---|---|
| primary aliphatic amines | 0 to 60 |
| secondary aliphatic amines | 0 to 90 |
| tertiary aliphatic amines | 10 to 100 |
| prim. aliphatic ammonium ions | 20 to 60 |
| sec. aliphatic ammonium ions | 25 to 80 |
| tert. aliphatic ammonium ions | 30 to 110 |
| amino acids (cation, zwitterion) | 30 to 60 |
| enamines | 40 to 110 |
| anilinium ions | 40 to 60 |
| piperidines, hydroquinolines | 30 to 90 |
| aminophosphines | 60 to 110 |
| guanidines | -N< 30 to 60
=N< 160 to 220 |
| ureas, carbamates, lactames | 60 to 130 |
| primary amides | 110 to 120 |
| secondary amides | 110 to 160 |
| tertiary amides | 95 to 140 |
| thioureas | 90 to 130 |
| thioamides | 135 to 160 |
| Nitramines | NO2 340 to 360
-N< 155 to 200 |
| indoles, pyrroles | 125 to 160 |
| hydrazones | =N- 330 to 340
-N< 150 to 190 |
| triazenes | -N=N-N< 445 to 465
-N=N-N< 355 to 375 -N=N-N< 150 to 175 |
| imides | 170 to 180 |
| nitriles, isonitriles | -C≡N 225 to 240
-N≡C 175 to 210 |
| pyrrole like nitrogens | 160 to 260 |
| Diazo | >=N=N 320 to 445
>=N=N 230 to 310 |
| Diazonium | R3C-N≡N 320 to 345
R3C-N≡N 220 to 230 |
| Pyridines | 230 to 330 |
| pyridine like nitrogen | 245 to 520 |
| imines | 305 to 375 |
| oximes | 360 to 410 |
| azoxy | 325 to 370 |
| nitro | 355 to 395 |
| azo | 505 to 555 |
| nitroso | S-NO to Ar-NO 800 to 930 N-N=O 540 to 570 |
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2 comments
Hi
I will like to know the 15N NMR signal for tetrabutylammoinium iodide. DO you expect this value to differ from those of propyltributylammonium iodide and tributylammonium iodide?
Thank you
Author
The 15N chemical shift for tetrabutylammoinium iodide should be in the same region as propyltributylammonium iodide. ACD-Labs calculate this value as -314.26 ppm refering to nitromethan or 65.94 ppm refering to liquid ammonia.