It is shown that the y, effects of hetero substituents on the "C chemical shift (7, SCS) are enlarged by +2 to +5 ppm by substituting the a-hydrogen atom by any group or atom (e.g. CH,, OR, F, (3, Br). The same is encountered when the axial y-hydrogen is replaced by CH3, OH or F. If, however, the su
✦ LIBER ✦
13C nuclear magnetic resonance spectra—VI: Stereochemical dependence of γanti, heterosubstituent effects on 13C chemical shifts of bridgehead substituted molecules
✍ Scribed by Helmut Duddeck; Harald Klein
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- French
- Weight
- 642 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4020
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## Abstract The ^13^C chemical shifts for 1,3‐dithiane and 9 methyl substituted derivatives are reported. Only three of the methyl‐1,3‐dithianes were conformationally anancomeric and hence the conformational equilibria must be taken into account when deriving the values of the different substituent