SCHEDULED MAINTENANCE:
A 13C chemical shift difference of 5 p.p.m. between the methyl groups of NN-dimethylformamide has its origin in the electric field of the carbonyl group; this effect may be as important as magnetic anisotropy in determining 1H chemical shifts.
W. McFarlane, J. Chem. Soc. D, 1970, 418 DOI: 10.1039/C29700000418
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