An acidimetric criterion for evaluating the reliability of stability constants of complexes and the nature of the ligands I. Introduction and application in the study of the Ag+-glycine system

Abstract

An acidimetric method is described that allows the nature of the ligand species in complexes of metals with ligands having acid-base character, to be defined. The basis of the procedure is the measurement of the quantity of H+ displaced by the cation owing to complex formation. A comparison of the quantity of effectively displaced H+ with the quantity that can be calculated on the basis of known values of stability constants is a useful criterion for evaluating the reliability of these constants. The method has found application in a study of the Ag+-glycine system and has enabled the stability constant of the complex, [Ag+(N+H3CH2COO−)], to be calculated.