Abstract
Proton-monomeric ligand dissociation and metal-monomeric ligand stability constants of 2-acrylamido-2-methyl-1-propanesulfonic acid with several metal ions were determined potentiometrically in water and 0.1 M KCl. In the presence of 2,2′-azobisisobutyronitrile as an initiator, the dissociation and stability constants of AMS were determined for the polymeric form (PAMS). The influence of temperature on the dissociation of AMS and the stability constants of their complexes in monomeric and polymeric forms were studied. The vinyl group in the monomeric form decreases the electron density and hence reduces the N–H bond strength (lower pKH2 value). The stability constants of the metal complexes in the polymeric form (better complexing agent) are larger than those of the monomeric form.
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