NDLI: Molecular Heteroconjugation Equilibria in (n-Butylamine + Acetic Acid) Systems in Binary (Dimethyl Sulfoxide + 1,4-Dioxane) Solvent Mixtures

Content Provider	Springer Nature Link
Author	Czaja, M. Makowski, M. Szociński, M. Darowicki, K. Chmurzyński, L.
Copyright Year	2007
Abstract	The acidity constants of molecular acid, K$_{ a }$(HA), cationic acid, K$_{ a }$(BH$^{+}$), as well as the equilibrium constants of anionic homoconjugation, $$K_{\rm AHA^{-}}$$ , cationic homoconjugation, $$K_{\rm BHB^+}$$ , and molecular heteroconjugation, K$_{AHB}$, have been determined in (n-butylamine + acetic acid) systems without proton transfer in binary [dimethyl sulfoxide (DMSO) + 1,4-dioxane (D)] solvent mixtures. The constants were determined by using the potentiometric titration method at a fixed ionic strength. It is concluded that the molecular heteroconjugation constants in the mixed solvent systems studied are linearly related to the 1,4-dioxane content. Furthermore, in the (acid + base) systems without proton transfer, the direction of titration (direct B + HA or reverse HA + B) has been found to affect the precision of determination of reliable values of molecular heteroconjugation constants. Moreover, it has been found that the relative dielectric constants of the solvent mixtures studied change linearly as a function of solvent composition, as well as solvent components do not show interactions of solvent–solvent type.
Starting Page	865
Ending Page	875
Page Count	11
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	28
Issue Number	3
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2007-08-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	acetic acid acid–base equilibria binary solvent mixtures dimethyl sulfoxide n-butylamine potentiometric titration method 1,4-dioxane Physical Chemistry Industrial Chemistry/Chemical Engineering Mechanics Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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