Carbonyl 17O Chemical Shift in the Proxi
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RubΓ©n H. Contreras; Rodolfo R. Biekofsky; Angel L. Esteban; Ernesto Diez; Jesus
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Article
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1996
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John Wiley and Sons
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English
β 547 KB
The effect of a cis-N-methyl group on the carbonyl 1 7 0 chemical shift, cis-MSCS, was investigated both from theoretical and experimental points of view in ten amide derivatives. Experimentally, it was observed that the cis-MSCS in N-methylformamide (2) corresponds to a shielding effect of 12.0 ppm