Abstract: | The kinetics of ligand substitution reactions of Ru(H2dtpa) (H2O)] (2) (H2dtpa=diprotonated diethylenetriaminepentaacetic acid) were studied as a function of ligand (L) concentration, pH (2.5–8.0) and temperature (30–45 °C) at 0.2 M ionic strength. The equilibrium constants for the formation of mixed ligand complex RuIII(dtpa) (L)] (L=2-mercaptopyrimidine, cysteine) and the distribution of various species in solution in the pH range of 2.5–8.0 were computed from potentiometric results. Ru(H2dtpa) (H2O)] ( H2dtpa= ) , pH (2,5–8,0) (30–45°C) 0,2 M. RuIII(dtpa) (L)] ( L=2-, ) pH=2,5–8,0. |