NMR spectral parameters of Ortho-disubstituted benzenes. Investigation of the additivity of substituent effects on the proton-proton coupling constants
✍ Scribed by S. Castellano; R. Kostelnik
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- French
- Weight
- 320 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
also required of the values of Jo determined from canpounds with the same substituents in & and meta positions; and of the values of J, determined from ortho. meta and E-disubstituted benzenes.
This treatment of the data offers the opportunity of deducing spectral parameters of benzene as accurate as those obtained experimentally for the monoand disubstituted caapounda.
📜 SIMILAR VOLUMES
## Abstract An additivity relationship of substituent effects on the formyl proton chemical shift has been tested with ten disubstituted benzaldehydes. In most cases it is found that the formyl proton chemical shift, extrapolated to infinite dilution in nitromethane, is in good agreement with that
## Abstract The increments in ^3^__J__(CH) for substituents attached to C^γ^ in the ^13^C^α^‐C^β^‐C^γ^‐^1^H coupling pathway, with respect to ^3^__J__(CH) in propane are calculated for equal C^β^‐C^γ^ rotamer population from ^3^__J__(CH) observed in the corresponding neopentyl compounds. From th
## Abstract The additivity of chloro and hydroxy substituent effects on the formyl proton spin‐spin coupling constants with the __meta__ ring proton, ^5^__J__(HH), has been tested with 15 chlorinated benzaldehydes and hydroxybenzaldehydes by multiple linear regression analysis. No general additivit
## 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