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A potentiometric study of cationic heteroconjugation equilibria in nitromethane andN,N- dimethylformamide

✍ Scribed by Ewa Kaczmarczyk; Katarzyna Maj; Lech Chmurzynski

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
116 KB
Volume
32
Category
Article
ISSN
0021-9614

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A potentiometric study of cationic heter
A potentiometric study of cationic heteroconjugation equilibria in systems with substituted pyridine N-oxides in nitrobenzene
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## 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

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Cationic standard heteroconjugation constants K o f (BHB 1 ) have been determined by potentiometric titration in systems formed by 4-aminopyridinium and 4-methylpyridinium cations with 4-methylpyridine, 2-methylpyridine, and pyridine in dimethyl sulfoxide. The constants, expressed as lgK o f (BHB 1