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NMR Reference

Residual Solvent References
chemical shift references:     1H    13C    31P

'methylene envelope' 29-30ppm

NMR shift DB

Rough guide to coupling constants
1JC,H = 140 Hz   (high s-character such as acetylenes can push it up to 250 Hz, silyl methyl groups can be as low as 120 Hz)
2JC,H = negative (around 5 Hz)
3JC,H = roughly follows the same Karplus rules and magnitudes as vicinal proton coupling.

Subpages (1): 31P-NMR