305
6.4.6 31 P Chemical Shifts of Natural Phosphorus Compounds (δ in
ppm relative to H 3 PO 4 )
H 3 C
N
O
P O
–
O
–
O
CH 3
CH 3
+
H 3 N
+
H
C C
HC
O
–
O
CH 3
O P
O
O
–
O
–
O
N
O
–
CH 3
HN
HN P
O
O
–
O
–
N
HO
H 3 C
O
O
P
O
O
–
O
–
O
P
O
HO
HO
O
CH 3
O
H
OH
HO
H
H
O
P
–
O
O
–
O
OH
O
P
O
O
–
O
–
O
P
O
–
O
–
O
O
NH 2
O
H
HO
H
HO
H
O H
OH
H
H
O
P
O
O
–
O
–
H 3 N
+
H
C C
CH 2
O
–
O
CH 2
CH 2
NH
C NH
NH
P
O
–
O
–
O
H 3 N
+
H
C C
CH 2
O
–
O
O
P O
–
O
–
O
H 3 N
+
H
C C
CH 2
O
–
O
N
N
P O
–
O
–
O
O
P
O
O
–
O
–
HO
HO
O
P
O
O
–
O
–
HO
OH
+
NH 3
O
P O
–
O
–
O
H 3 N
+
H
C C
CH 2
O
–
O
N
N
P
O
–
O O
–
-2.5
3.2
3.7
-1.1
-1.5
-3.9
-4.3
4.0
4.6
4.5
4.0
-5.5
-3.0
3.7
-4.5
4.0
6.4 31 P NMR Spectroscopy