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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BUJ6-0021-0046

Czasopismo

Polish Journal of Chemistry

Tytuł artykułu

The Influence of Solvent in Binary Acetonitrile -Water Solvent Systems on Dissociation Constants of Protonated Pyridine and Its N-Oxide

Autorzy Wróbel, R.  Makowski, M.  Czaja, M.  Chmurzyński, L. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Using a 2,6-dinitrophenol - tetra-n-butylammonium 2,6-dinitrophenolate standardizing system, the application of the previously proposed method for pKa determination of potentiometric standards in binary solvent systems consisting of an organic polar solvent (acetonitrile in this case) and water was checked. The reliability of the obtained pKa values of 2,6-dinitrophenol was checked in a system of protonated pyridine in acetonitrile - water mixtures over the range of 0 through 1 mole fraction of acetonitrile, for which literature data were available. The method checked in this way was subsequently used to determine pKa of protonated pyridine N-oxide in this binary solvent system. pKa values served for discussion of the variations of pKa's of cationic acids conjugated with pyridine and its N-oxide and of the influence of composition of the binary solvent.
Słowa kluczowe
Wydawca Polskie Towarzystwo Chemiczne
Czasopismo Polish Journal of Chemistry
Rocznik 2001
Tom Vol. 75, nr 11
Strony 1767--1774
Opis fizyczny Bibliogr. 24 poz., rys.
Twórcy
autor Wróbel, R.
autor Makowski, M.
autor Czaja, M.
autor Chmurzyński, L.
  • Department of General Chemistry, Faculty of Chemistry, University of Gdansk, Sobieskiego 18, 80-952, Gdansk, Poland
Bibliografia
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-article-BUJ6-0021-0046
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