Abstract
Certain equilibria involving polymeric gold(I) thiomalate complexes have been studied by spectrophotometry and pH measurements in aqueous solution at 25°С and I = 0.2 M (NaCl). Thiomalate protonation constants Hi–1Tm3– + H+ = HiTmi–3 have been found to be logKH1 = 10.23, logKH2 = 4.51, logKH3 = 3.01. Efficient functions have been used to allow for multiple protonation of polymeric complexes Aun Tm n-3 m m Equilibrium constants for reactions Au4Tm 8−4 + Tm3– = Au4Tm 11−5 (logK45 = 10.1 ± 0.5) and 0.25 Au4Tm48− + Tm3– = AuTm25− (logK12 = 4.9 ± 0.2) have been determined. Standard potential for AuTm25− has been found to be equal to E1/00 =–0.260 ± 0.025 V.
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Original Russian Text © I.V. Mironov, V.Yu. Kharlamova, 2018, published in Zhurnal Neorganicheskoi Khimii, 2018, Vol. 63, No. 7, pp. 933–938.
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Mironov, I.V., Kharlamova, V.Y. On Gold(I) Thiomalate Complexes in Aqueous Solution. Russ. J. Inorg. Chem. 63, 978–982 (2018). https://doi.org/10.1134/S0036023618070173
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DOI: https://doi.org/10.1134/S0036023618070173