Salicylic acid derivatives form stable complexes with scandium(III) ion in aqueous solution.
The stability constants of 5-nitrosalicylic acid (5-NSA) and 5-sulfosalicylic acid (5-SSA) complexes of Sc(III) were determined by potentiomeric pH titration. ML and ML2 type first and second complexes were observed in the solutions of 5-NSA and 5-SSA with Sc(III) at 25 degrees C in I=0.1 M ionic medium. The stability constants of Sc(III)-5NSA and Sc(III)-5SSA systems were also investigated by spectrophotometry to determine the stoichiometries of the complexes formed in the reactions. Our results showed that Sc(III)-5SSA complexes are more stable than the Sc(III)-5NSA complexes in aqueous solutions.
Türkel
N
N
Department of Chemistry, Faculty of Arts and Sciences, Uludağ University, Bursa, Turkey. nturkel@uu20.bim.uludag.edu.tr
Ozer
U
U
D020156:Salicylic Acid / Q000737:chemistry*; D012538:Scandium / Q000737:chemistry*; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet
D012996:Solutions; D020156:Salicylic Acid; D012538:Scandium