Chelating tendencies of pyrazinecarboxylic acid and 3-aminopyrazinecarboxylic acid

الملخص EN

The chelate stability constants of pyrazinecarboxylic acid (?CA) and 3-a^nopyrazinecarboxylic acid (3-A?CA) with divalent Co, Cu, Mn, and trivalent آء ions are reported at 25°c and ionic strength 0.1 M.

In addition, the study ,is concerned with the effect of ionic strength and temperature on the chelate stability constants of the complexes with Co (II).

The relative values of the overall stability constants (log Pn), in order of decreasing stability, are Co > Cu > Mn > Cr for complexes with the two ligands (PCA and 3-A?CA).