Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/4900
Title: Complex formation study of binary and ternary complexes including 2,3-Dihydroxybenzoic Acid, N-acetylcysteine and divalent metal ions
Authors: Santoso, Shella Permatasari
Trần, Nguyễn Phương Lan
Ju, Yi-Hsu
Ismadji, Suryadi
Ayucitra, Aning
Angkawijaya, Artik Elisa
Soetaredjo, Felycia Edi
Keywords: Stability constant
Potentiometry
N-acetylcysteine
2,3-dihydroxybenzoic acid
Divalent metal
Issue Date: 2016
Series/Report no.: Journal of Solution Chemistry;45 .- p.518–533
Abstract: The binary and ternary complex stability constants between 2,3-dihydroxybenzoic acid (DA) and N-acetylcysteine (Nac) with the divalent metal ions (M) Mn²⁺, Co²⁺, Ni²⁺, Cu²⁺ and Zn²⁺ were studied in aqueous solution at 310.15 K and an ionic medium of 0.15 mol·dmˉ³ NaCl. The complexes’ stability constants (log₁₀ β), refined from the potentiometric data using the Hyperquad2008 program, indicate that the ternary complexes are more stable than the binary complexes. The stability constants were supported by additional computation, refined from the spectrophotometric data using the Hypspec program. The values of the ternary complex stability relative to their binary complex (Δlog₁₀ K) and the disproportionation constant (log10 X) indicate that formation of ternary complex species [M(DA)(Nac)]³ˉ is more favorable than that of species formed by two identical ligands, [M(DA)₂]⁴ˉ or [M(Nac)₂]²ˉ. For the investigated M, the stability of complexes follows the trend Cu²⁺ > Zn²⁺ > Ni²⁺ > Co²⁺ > Mn²⁺+.
URI: http://dspace.ctu.edu.vn/jspui/handle/123456789/4900
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