PROTONATION AND SILVER(I) COMPLEX-FORMATION EQUILIBRIA OF SOME AMINO-ALCOHOLS

Formation constants of the silver(I) complexes with some amino-alcohol s have been determined at 25 degrees C in 0.5 M KNO3 by means of two i ndependent potentiometric measurements employing glass and silver elec trode. The ligands considered are: sec-butylamine, 2-amino-1-propanol, 2-amino-1-methoxy-propane, 2-amino-2-methyl-1-propanol, 2-amino-1-but anol, 2-amino-1-pentanol, 2-amino-1-hexanol, 2-amino-1,3-propanediol, 2-amino-1,3-hexandiol, 2-amino-2-methyl-1 ,3-propanediol and Tris(hydr oxymethyl)-aminomethane. Protonation constants of the selected ligands have also been determined. Calculations were made using HYPERQUAD com puter program. The influence exerted by the introduction of hydroxy gr oups and by the presence of alkyl residuals in the ligand structure on the formation equilibria, is discussed. (C) 1997 Elsevier Science B.V .