NMR Spectroscopy

Typical Proton Coupling Constants for Aromatic Compounds


3J ortho 6 - 10 Hz
4J meta 1 - 4 Hz
5J para 0 - 2 Hz
3J ab 1.6 - 2.0 Hz
4J ab' 0.3 - 0.8 Hz
4J aa' 1.3 - 1.8 Hz
3J bb' 3.2 - 3.8 Hz
3J ab 2.0 - 2.6 Hz
4J ab' 1.0 - 1.5 Hz
4J aa' 1.8 - 2.3 Hz
3J bb' 2.8 - 4.0 Hz
3J ab 4.6 - 5.8 Hz
4J ab' 1.0 - 1.5 Hz
4J aa' 2.1 - 3.3 Hz
3J bb' 3.0 - 4.2 Hz
3J ab 4.9 - 5.7 Hz
4J ag 1.6 - 2.0 Hz
5J ab' 0.7 - 1.1 Hz
4J aa' 0.2 - 0.5 Hz
3J bg 7.2 - 8.5 Hz
4J bb' 1.4 - 1.9 Hz


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