Some well known Karplus equations are discussed and their shortcomings are indicated. To remedy the problems associated with the experimentally observed non-additive substituent effects on vicinal protowproton coupling constants, an extension given recently is discussed; this accounts for pairwise i
✦ LIBER ✦
Extended Hückel theory MO calculations of proton-proton coupling constants. The substituent effect in fluoroethane.
✍ Scribed by K.G.R. Pachler
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- French
- Weight
- 178 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0040-4039
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## Abstract Orientation effects of electronegative substituents on vicinal carbon‐proton coupling constants are studied in 1,2‐disubstituted propanes and are found to resemble those on vicinal proton‐proton coupling constants. Known relations for the orientation effect of substituents on synclinal