258
Condensed Heteroaromatic Rings. 15 N Chemical Shifts and Coupling
Constants (δ in ppm relative to CH 3 NO 2 , J in Hz; solvent DMSO,
unless indicated otherwise)
N
N
N
CH 3
N
N CH 3
N
N
N
N N
N
N
N
H
N
N
N
N
N
CH 3
-190.1
-178.6
-69.5
-123.6
-139.6
-96.7
-96.7
-40.8
-96.7
-10.3
+41.3
+44.6
-50.1
-97.8
-262.6
-309.6 (H 2 SO 4 )
-272.7
-74.4
-86.5
-63.5
-69.3
-69.0
-65.7
-65.3
-161.8
-7.5
-0.9
-185.8
-143.2
-92.8
-107.5
N
N
N
N
N
N
N
N
N
N
N
H
N
N
CH 3
-249.0
-203.8
-92.3
-162.1
-200.6
(acetone)
-57.6
-65.1
-259.8
-218
(ether)
N
H
N
CH 3
N CH 3
N
H
N
N
N
CH 3
1 J NH -96.3
2 J NH 10.2
2 J NH 6.5
1 J NH 97.4
N
N
N
N
Heteronuclear NMR Spectroscopy
6