The effects of the coexisting anlons on the complex formation of rare earth ions with thiocyanate ions in aqueous solution

摘要

Complex formation of rare earth ions with thiocyanate ions was investigated in the presence of coexisting anions (Cl or C1O4 ions). From the frequency variations of the CS and CN stretching Raman bands, it is shown that both the coordination number change in the middle of the series and the complex formation of rare earth ions with thiocyanate ions are affected by the coexisting anions. Some discussion was made on the anomalous behavior of the coordination number change with the salt concentration.