Abstract
Abstract The complex formation of silver(I) ion with glycine and β-alanine was studied at 25 °C in an aqueous solution containing 3 mol dm−3 LiClO4 as a constant ionic medium by means of potentiometric titrations. At a relatively low pH region, the AgHL+ complex (L− represents glycinate and β-alaninate ions) was formed, in which the silver ion was coordinated with the carboxyl group of the ligands. At a medium pH range, the AgL and AgL2− complexes were formed. From the formation constants of the complexes, it is suggested that the silver ion within the complexes may be coordinated with the amino group of the ligands and the interaction between the metal ion and the carboxyl group within the complexes is so weak that the interaction does not appreciably stabilize the complexes. At the highest pH region, the hydrolyzed species Ag(OH)L− was formed.
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