A correlation between substituent effects on chemical shifts in conjugated systems and coupling constants
✍ Scribed by A.R. Katritzky; B. Ternai; G.J.T. Tiddy
- Publisher
- Elsevier Science
- Year
- 1966
- Tongue
- French
- Weight
- 158 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract The effects of an hydroxy substituent on ^13^C^13^C coupling constants and ^13^C chemical shifts have been measured in 1‐hydroxynaphthalene‐2‐^13^C and 1‐hydroxypyrene‐1‐^13^C. The changes observed in the ^13^C^13^C couplings show the effect of a substituent attached directly to the l
## Abstract Long range inter‐ring ^13^C^13^C couplings are found to be effective in the title compounds, and the magnitudes of coupling constants and of substituent effects on ^13^C chemical shifts, as well as the signs of the latter, alternate with respect to the number of connecting bonds.
## Abstract At the present time no completely satisfactory quantum mechanical calculations exist for carbon, proton or fluorine chemical shifts in various substituted aromatic or olefinic systems. However, the chemical shifts in such systems have been shown to be well correlated by a linear multipl
## Abstract The effect of substituents on the proton chemical shifts and spin–spin coupling constants in __ortho__‐, __meta__‐ __and para__‐substituted 5‐phenyltetrazoles (tetrazolic acids) in DMSO–CH~3~CN (1:1, v/v) was studied. With the __meta__‐ and __para__‐ substituted compounds the additivity