N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
98
4 13 C NMR
4.4.2 Coupling Constants
13 C- 1 H Coupling Constants
Coupling through one bond (| 1 J CH | in Hz)
Coupling through two bonds (| 2 J CH | in Hz)
Coupling through three bonds (| 3 J CH | in Hz)
13 C- 13 C Coupling Constants (| 1 J CC | in Hz)
13
C
H
H
2.1
8.1
124.2
124.5
129.0
126.1
125.9
123.6
125.5
120.9
144.7
143.5
136.8
39.1
29.5
23.6
133.8
132.1
143.9
25.3
160
2.6
12.4
134
1 J ab 13.4
1 J bc 44.0
3.5
128
3.0
125
3.7
32.7
32.8
CH 3
a b c