302
6.4.4 31 P Chemical Shifts of Tetracoordinated P(=O) and P(=S) Compounds (δ in ppm relative to H 3 PO 4 )
31 P Chemical Shifts of Tetracoordinated P(=O) Compounds
Substituent R 1
R 2
R 3
δ
–CH 3
–CH 3
–H
63
–CH 3
–CH 3
–CH 3
41
–CH 2 CH 3
–CH 2 CH 3
–CH 2 CH 3
48
–phenyl
–phenyl
–phenyl
27
–CH 3
–CH 3
–F
66
–CH 3
–CH 3
–Cl
65
–CH 3
–CH 3
–Br
51
–CH 2 CH 3
–CH 2 CH 3
–Cl
77
–phenyl
–phenyl
–Cl
43
–CH 3
–F
–F
27
–CH 3
–Cl
–Cl
44
–CH 3
–Br
–Br
9
–CH 2 CH 3
–Cl
–Cl
55
–F
–F
–F
-36
–Cl
–Cl
–Cl
2
–Br
–Br
–Br
-103
–N(CH 3 ) 2
–N(CH 3 ) 2
–N(CH 3 ) 2
24
–H
–H
–OCH 3
19
–CH 3
–H
–OH
35
–CH 3
–CH 3
–OH
31
–CH 3
–CH 3
–OCH 3
52
–phenyl
–phenyl
–OH
29
–phenyl
–phenyl
–OCH 3
32
–CH 3
–Cl
–OCH 2 CH 3
40
–Cl
–Cl
–OCH 3
6
–F
–F
–OCH 2 CH 3
-21
–H
–OCH 3
–OCH 3
11
–CH 3
–OH
–OH
31
–CH 3
–OCH 3
–OCH 3
32
–CCl 3
–OCH 2 CH 3
–OCH 2 CH 3
7
–phenyl
–OH
–OH
18
–phenyl
–OCH 3
–OCH 3
21
–Cl
–OCH 2 CH 3
–OCH 2 CH 3
3
C
X
N
O
2 O
P
O
R
2
R
1
R
3
Heteronuclear NMR Spectroscopy
6