270
Thiocyanates and Isothiocyanates. 15 N Chemical Shifts (δ in ppm
relative to CH 3 NO 2 )
6.1.9 Natural Products
Amino Acids. 15 N Chemical Shifts and Coupling Constants (δ in ppm
relative to CH 3 NO 2 , J in Hz; solvent: water)
+ H 3 N
O –
O
SH
+ H 3 N
OH
O
SH
+ H 3 N
O –
O
S
CH 3 SCN
SCN
SCN
H
H
H
SCN
SCN
Li + SCN –
CH 3 NCS
NCS
NCS
NCS
-163.2
(D 2 O)
-105
(neat)
-102
(neat)
-103
(neat)
-95.6
(neat)
-97.0
(neat)
-289.9
(DMSO)
-277.0
(neat)
-255.0
(neat)
-273.1
(neat)
+ H 3 N
OH
O
+ H 3 N
O –
O
H 2 N
O –
O
-348.9
1 J NH -77
-337.4
3 J NH -3.1
-344.0
-338.7
-343.1
-341
-341
-344.0
-338.1
-347.3
1 J NH -74.7
-337.1
-344.1
-348
-348.9
+ H 3 N
OH
O
+ H 3 N
O –
O
+ H 3 N
OH
O
+ H 3 N
O –
O
+ H 3 N
OH
O
+ H 3 N
OH
O
+ H 3 N
OH
O
OH
+ H 3 N
O –
O
HO
Heteronuclear NMR Spectroscopy
6