The protonation constants of 2,2′-bipyridyl, 1,10-phenanthroline, 1,3-diaminopropane, l-histidine and histamine have been determined potentiometrically, in the temperature range 10–40° and at ionic strengths ranging from 0.04 to 1 (potassium chloride). The dependence of the protonation constants on ionic strength is described by a simple general equation. The enthalpy changes for the protonation of the ligands have been calculated from the temperature dependence of the protonation constants.
Ionic Strength Dependence of Formation Constants - V. Protonation Constants of Some Nitrogen-Containing Ligands at Different Temperatures and Ionic Strengths
SAMMARTANO, Silvio
1985-01-01
Abstract
The protonation constants of 2,2′-bipyridyl, 1,10-phenanthroline, 1,3-diaminopropane, l-histidine and histamine have been determined potentiometrically, in the temperature range 10–40° and at ionic strengths ranging from 0.04 to 1 (potassium chloride). The dependence of the protonation constants on ionic strength is described by a simple general equation. The enthalpy changes for the protonation of the ligands have been calculated from the temperature dependence of the protonation constants.File in questo prodotto:
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