Formation of Yttrium(III) Complexes with Salicylic Acid Derivatives in Aqueous Solution
نویسندگان
چکیده
Complexes of yttrium(III) formed with 5-sulphosalicylic acid, 5-SSA (H3L), and 5-nitrosalicylic acid, 5-NSA (H2L), were investigated in 0.1 mol.dm −3 sodium perchlorate ionic medium at 25.0 ± 0.1 ◦C potentiometrically for various molar ratios of Y(III) to these salicylic acid, SA (H2L), derivatives. Y(III) forms YL and YL3− 2 type complexes with 5-SSA that have rather high stabilities (log β1= 7.91 ± 0.01 and log β2= 14.56 ± 0.06). In the Y(III):5-NSA system, YL and YL2 type complexes appear with high stabilities (log β1= 7.39 ± 0.02 and log β2= 13.50 ± 0.07). Y(III):5-SSA and Y(III):5-NSA complexes exist over a very wide pH range (pH 2.50-11.0) and these SA derivatives are coordinated from salicylate
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