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3. Carbon NMR spectra constants 13C
The chemical shifts δ (in ppm) of the carbons 13 C are given here, as for the proton 1 H, in 3 forms: graphs, data tables and empirical formulas.
In the case of aliphatic derivatives, the major effects are due to the intensity of inductive effects.
For ethylenic and aromatic derivatives, the carbon most sensitive to the inductive effect is the one bearing the substituent. For other carbons, the major effects are due to the mesomeric effect of the substituent.
Finally, acetylenic carbons are relatively insensitive to the effects of substituents.
Stereochemistry plays a significant role, in particular due to steric effects.
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Carbon NMR spectra constants 13C
NMR spectral constants for phosphorus 31 and nitrogen 15
Bibliography
References
Spectrum catalogs
IT tools
HNMR DataBase, CNMR DataBase (databases) and HNMR, CNMR (spectra calculation software). ADC 133.
Speclib (spectra library) and Spectool (characteristics of 1 H and 13 C NMR spectra by class of compound or type of structure).
C-13 NMR spectra on line computer program and data bank. STN International....
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