The stabilities of some mixed proton complexes AA'Hi (A = histidine (His), lysine (Lys), histamine (Hist); A' = bi-, tri- and tetra-carboxylic acids, aspartic acid and glutamic acid) are detd. potentiometrically. Different species in each system are found with j = 1,...,(n+m)-1 (n and m are the max. degrees of protonation for the two ligands). The stability of a mixed species is strictly dependent on the charges involved in the formation reactions; a simple relationship logK = f(zT) (where zT is the sum of charges in the two ligands) is found.
Mixed Aminocarboxylic Ligand Complexes
DE STEFANO, Concetta;FOTI, Claudia;SAMMARTANO, Silvio;
1995-01-01
Abstract
The stabilities of some mixed proton complexes AA'Hi (A = histidine (His), lysine (Lys), histamine (Hist); A' = bi-, tri- and tetra-carboxylic acids, aspartic acid and glutamic acid) are detd. potentiometrically. Different species in each system are found with j = 1,...,(n+m)-1 (n and m are the max. degrees of protonation for the two ligands). The stability of a mixed species is strictly dependent on the charges involved in the formation reactions; a simple relationship logK = f(zT) (where zT is the sum of charges in the two ligands) is found.File in questo prodotto:
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