{"id":17,"date":"2013-11-04T20:59:29","date_gmt":"2013-11-04T18:59:29","guid":{"rendered":"https:\/\/wissen.science-and-fun.de\/chemistry\/?page_id=17"},"modified":"2021-03-24T18:24:42","modified_gmt":"2021-03-24T16:24:42","slug":"15n-chemical-shifts","status":"publish","type":"page","link":"https:\/\/wissen.science-and-fun.de\/chemistry\/spectroscopy\/15n-chemical-shifts\/","title":{"rendered":"15N chemical shifts"},"content":{"rendered":"

liquid NH3<\/sub> at 25\u00b0C = 0 ppm
\nAll chemical shifts given in ppm!
\nSource: Bruker Almanac 2012<\/p>\n

\"click<\/a><\/p>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Type<\/th>\nchemical shift range<\/th>\n<\/tr>\n
primary aliphatic amines<\/td>\n0 to 60<\/td>\n<\/tr>\n
secondary aliphatic amines<\/td>\n0 to 90<\/td>\n<\/tr>\n
tertiary aliphatic amines<\/td>\n10 to 100<\/td>\n<\/tr>\n
prim. aliphatic ammonium ions<\/td>\n20 to 60<\/td>\n<\/tr>\n
sec. aliphatic ammonium ions<\/td>\n25 to 80<\/td>\n<\/tr>\n
tert. aliphatic ammonium ions<\/td>\n30 to 110<\/td>\n<\/tr>\n
amino acids (cation, zwitterion)<\/td>\n30 to 60<\/td>\n<\/tr>\n
enamines<\/td>\n40 to 110<\/td>\n<\/tr>\n
anilinium ions<\/td>\n40 to 60<\/td>\n<\/tr>\n
piperidines, hydroquinolines<\/td>\n30 to 90<\/td>\n<\/tr>\n
aminophosphines<\/td>\n60 to 110<\/td>\n<\/tr>\n
guanidines<\/td>\n-N< 30 to 60<\/p>\n

=N< 160 to 220<\/td>\n<\/tr>\n

ureas, carbamates, lactames<\/td>\n60 to 130<\/td>\n<\/tr>\n
primary amides<\/td>\n110 to 120<\/td>\n<\/tr>\n
secondary amides<\/td>\n110 to 160<\/td>\n<\/tr>\n
tertiary amides<\/td>\n95 to 140<\/td>\n<\/tr>\n
thioureas<\/td>\n90 to 130<\/td>\n<\/tr>\n
thioamides<\/td>\n135 to 160<\/td>\n<\/tr>\n
Nitramines<\/td>\nNO2<\/sub> 340 to 360<\/p>\n

-N< 155 to 200<\/td>\n<\/tr>\n

indoles, pyrroles<\/td>\n125 to 160<\/td>\n<\/tr>\n
hydrazones<\/td>\n=N- 330 to 340<\/p>\n

-N< 150 to 190<\/td>\n<\/tr>\n

triazenes<\/td>\n-N=N<\/i>-N< 445 to 465<\/p>\n

-N<\/i>=N-N< 355 to 375<\/p>\n

-N=N-N<<\/i> 150 to 175<\/td>\n<\/tr>\n

imides<\/td>\n170 to 180<\/td>\n<\/tr>\n
nitriles, isonitriles<\/td>\n-C\u2261N 225 to 240<\/p>\n

-N\u2261C 175 to 210<\/td>\n<\/tr>\n

pyrrole like nitrogens<\/td>\n160 to 260<\/td>\n<\/tr>\n
Diazo<\/td>\n>=N<\/i>=N 320 to 445<\/p>\n

>=N=N<\/i> 230 to 310<\/td>\n<\/tr>\n

Diazonium<\/td>\nR3<\/sub>C-N\u2261N<\/i> 320 to 345<\/p>\n

R3<\/sub>C-N<\/i>\u2261N 220 to 230<\/td>\n<\/tr>\n

Pyridines<\/td>\n230 to 330<\/td>\n<\/tr>\n
pyridine like nitrogen<\/td>\n245 to 520<\/td>\n<\/tr>\n
imines<\/td>\n305 to 375<\/td>\n<\/tr>\n
oximes<\/td>\n360 to 410<\/td>\n<\/tr>\n
azoxy<\/td>\n325 to 370<\/td>\n<\/tr>\n
nitro<\/td>\n355 to 395<\/td>\n<\/tr>\n
azo<\/td>\n505 to 555<\/td>\n<\/tr>\n
nitroso<\/td>\nS-NO to Ar-NO 800 to 930
\nN-N=O 540 to 570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n