N
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
4.11 Carbonyl Compounds
141
13 C Chemical Shifts of Lactones (δ in ppm)
O
O CH 3
O
O
CH 3
O
O
CH 3
O
O
H 3 C
O
O
O
O CH 3
CH 3
O
O
O
O CH 3
CH 3
O
O
O
O
CH 3
CH 3
O
O
O
O CH 3
CH 3
O
O
CH 3
O
O
CH 3
O
O
CH 3
O
O
CH 3
O
O
CH 3
Cl
Cl
Cl
O
O
CH 3
Cl
Cl
O
O
CH 3
Cl
O
O
OH
O
O
O
O
O
O
128.8
130.4
167.8
165.1
162.5
166.5
166.8
129.7
128.4
132.8
130.5
43.3
175.3
153.4
158.4
167.6
173.1
165.8
168.6
171.2
163.8
161.6
176.0
178.1
174.4
177.1
133.5
165.3
152.3
130.1
53.0
54.2
55.7
51.5
51.8
51.2
53.1
52.1
39.1
29.2
146.2
117.0
19.1
121.4
142.9
69.3
66.6
152.1
22.3
24.0
106.0
27.8
69.2
29.3 29.0
23.0
34.6
87.6
34.2
22.3
180.5
100.2
(in acetone)
68.8
67.9
153.6
58.7
52.2
53.6
74.6
52.3
51.3
41.2
29.1
40.7
26.0
26.4
29.6
75.6
74.8
64.1
89.6
O
O
O
O
O
O
O
O