Table 1.
1H-1H and 1H-13C coupling constants for the assignment of RC for vicinally-disubstituted chains using JBCA. Values obtained from refs. 34, 36, and 38.
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|---|---|---|---|---|---|---|
| 3J 1H-1H coupling constants | 3J 1H-13C coupling constants | 2J 1H-13C coupling constants | ||||
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| rotamer (magnitude of coupling) | ||||||
| anti (large) | gauche (small) | anti (large) | gauche (small) | anti (small) | gauche (large) | |
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9 – 12 Hz | 2 – 4 Hz | 6 – 8 Hz | 1 – 3 Hz | – | – |
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8 – 11 Hz | 1 – 4 Hz | 6 – 8 Hz | 1 – 3 Hz | 0 – −2 Hz | −5 – −7 Hz |
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7 – 10 Hz | 0 – 4 Hz | 5 – 7 Hz | 1 – 3 Hz | 0 – 2 Hz | −4 – −6 Hz |
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7.5 – 10.5 Hz | 1 – 3.5 Hz | 4 – 5 Hz | 0 – 3 Hz | −0.5 – 4 Hz | −3.5 – −6.5 Hz |