N
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
4.11 Carbonyl Compounds
145
13 C Chemical Shifts of Carboxylic Acid Imides (δ in ppm)
13 C Chemical Shifts of Carbonic Acid Derivatives (δ in ppm)
O
N
H
H 3 C
O
S
CH 3
S
H 3 C
S
O
CH 3
O
H 3 C
O
N
O
O
CH 3
N
O
O
CH 3
N
O
O
CH 3
H 3 C
N
CH 3
O
O
CH 3
H 3 C
N
H
CH 3
O
O
N
N
O
N
H
H 2 N
O
NH 2
H 2 N
O
N
N
O
N
N
S
N
N
O
N C N
12.3
Na
+
S
–
N
S
O
–
H 2 N
O
NH 4
+
O
O
O
O
O
O
54.9
65.0
24.1
26.0
30.3
27.9
24.0
27.4
(in D 2 O)
(in D 2 O)
(in DMSO)
14.7
15.5
31.4
35.6
48.0
49.0
22.3
24.7
45.0
38.5
43.2
38.5
43.2
34.0
60.7
20.2
68.1
21.7
156.5
157.8
206.7
226.2
155.9
153.4
131.7
163.5
158.7
165.4
194.0
NH
O
O
NH
O
O
C O
O
–
O
O
O
–
O
O
O
O
O
O
O
O
O
183.6
181.3
124.2
192.8
168.2
171.6
173.0
135.5
134.3
167.5
170.8
173.0
133.7
122.4
131.5
177.6
C S
S
C O
13.6
19.1 67.3
30.9
155.9
63.8
14.4
155.4
162.0
49.6
49.6
12.3
31.3
23.6
23.2
162.0
156.9
148.7
140.3