N
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
225
5.10 Sulfur Compounds
225
5.10.3 Disulfides and Sulfonium Salts
1 H Chemical Shifts and Coupling Constants (δ in ppm, J in Hz)
5.10.4 Sulfoxides and Sulfones
1 H Chemical Shifts and Coupling Constants (δ in ppm, J in Hz)
S
H
H
H
O
O
S
O
O
S
O
H
H
H
S S
S S
S S
S
S
S
+
I
–
S
S
3 J ab 7.5
4 J ac 1.4
5 J ad 0.5
4 J ae 2.0
3 J bc 7.2
4 J bd 1.6
7.24
7.29
7.47
a
b
c
d
e
2.7
2.94
2.64
2.88
2.62
2.84
2.96
6.76
6.14
6.43
2.80
2.85
3.13
1.41
1.44
2.94
1.47
3.15
3.74
3.06
7.94
7.61
7.65
6.08
2.61
6.77
5.92
6.08
neat: 2.50
2.43
2.05
2.42
1.92
2.30
1.32
1.70
1.31
2.69
1.00 2.66
3.75
1.84
1.57
1.01
(in DMSO)
1.9
S S
alk
S
O
S
O
S
O
S
O
O
S
O
O
S
O
O
S
O O
S
O
O
S
O
S
O
O
(CH 3 ) 3 S
+
I
–