N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
132
4 13 C NMR
13 C Chemical Shifts of Sulfonium Salts (δ in ppm)
4.10.4 Sulfoxides and Sulfones
13 C Chemical Shifts (δ in ppm)
H 3 C
S
O O
H 3 C
S CH 3
O O
H 3 C
S
O O
H 3 C
S
O O
H 3 C
S
O O
S
CH 3
O
H 3 C
S CH 3
O
I
–
S
+
CH 3
S
+
BF 4
–
H 3 C
S
+
CH 3
CH 3 I
–
S
+
I
–
27.5
40.1
42.6
34.2
57.6
22.7
37.1
39.3
40.3
48.2
6.7
56.3 13.0
16.3
54.3
51.1
49.0
52.6
43.9
19.3
25.1
25.3
24.3
25.4
22.7
39.8 21.8
13.6
22.4
37.8
20.5
22.7
26.9
7.1
22.1
131.0
130.1
134.0
126.9
S
O
S
O
S
O O
S
O
O
S
O
O
146.1
123.5
129.6
130.9
127.6
129.3
133.2
141.6
53.5
15.2