N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
224
5 1 H NMR
5.10.2 Sulfides
1 H Chemical Shifts and Coupling Constants (δ in ppm, J in Hz)
1 H Chemical Shifts and Coupling Constants of Cyclic Sulfides
(δ in ppm, J in Hz)
S
S
S
S
S
S
S
S
S
S
H
H
H
S
2.12
2.09
2.10
2.49
2.48
1.56
2.51
1.42
1.42
2.25
6.43
5.18
4.95
0.99
0.92
2.47
7.18
7.16
7.02
2.36
3.21
2.82
2.57
2.57
3.88
4.28
(in DMSO)
≈1.7
≈1.7
3.81
3.67
2.85
3.79
2.83
2.08
5.81
3.11
1.94
2.94
3.08
5.97
5.55
2.84
6.06
5.48
2.62
2.55
2.93
1.60
1.25
1.26
1.26
a
c
b
3 J ab 10.3
3 J ac 16.4
2 J bc -0.3
3 J ab 7.8
4 J ac 1.2
5 J ad 0.6
4 J ae 2.0
3 J bc 7.4
4 J bd 1.5
3 J ab 9.2
3 J bc 2.5
4 J bd 2.2
3 J cd 6.1
7.20
7.06
7.20
a
a
a
b
b
b
d
c
c
c
d
e
S
S
S
S
S
S
S
O
S
S
S
S
S
S
2 J a,gem -8.7
2 J b,gem -11.7
3 J ab,cis 8.9
3 J ab,trans 6.3
4 J ac,cis 1.2
4 J ac,trans -0.2
2 J gem 0
3 J cis 7.2
3 J trans 5.7
S
S