Abstract
Protonation constants of triethylenetetramine (trien) and tetraethylenepentamine (tetren) were determined, in NaCl aqueous solutions, at different ionic strengths, at 25°C, using the the pH-metric technique. The behavior of protonation constants as a function of ionic strength can be explained by a model which takes into account the formation of the species AH q Cl p [A=amine; q=1...4, p=1,2 (trien); q=1...5, p=1.3 (tetren)].
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De Robertis, A., De Stefano, C., Patane, G. et al. Effects of salt on the protonation in aqueous solution of triethylenetetramine and tetraethylenepentamine. J Solution Chem 22, 927–940 (1993). https://doi.org/10.1007/BF00646604
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DOI: https://doi.org/10.1007/BF00646604