## Cationic heteroconjugation equilibria have been studied potentiometrically in systems containing substituted pyridine Noxides in a polar protophobic aprotic solvent, nitrobenzene. For comparison, systems with trimethylamine N-oxide, MesNO, representing aliphatic amine N-oxides, and pyridine, Py
A potentiometric study of acid-base equilibria of substituted pyridine N-oxides in nitrobenzene
✍ Scribed by L. Chmurzyński; A. Liwo; P. Barczyński
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 596 KB
- Volume
- 335
- Category
- Article
- ISSN
- 0003-2670
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📜 SIMILAR VOLUMES
## Ácid᎐base equilibria in systems consisting of substituted pyridines and their N-oxides have been studied in propylene carbonate, a strong ionizing, polar, protophobic, aprotic solvent. For the sake of comparison, aliphatic trimethylamine N-oxide was also included. Of particular interest in this
The method of comparison of the capacity of polar non-aqueous solvents to differentiate between the strengths of cationic acids, based on the magnitude of slope in correlations of the non-aqueous and aqueous pK, values, has been found inapplicable to acids obtained by protonation of substituted pyri
An attempt has been made to determine potentiometrically standard acidity K o a (BH + ) constants of protonated substituted pyridine N-oxides and cationic standard homoconjugation constants K o f (BHB + ) of these acids conjugated with the N-oxides in a binary solvent system. The system consisted of