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Stability of diammine and chloroammine gold(I) complexes in aqueous solution

  • Physical Chemistry of Solutions
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Abstract

The substitution equilibria AuCl −2 + iNH +4 = Au(NH3)iCl2 − i + iCl− + iH+, β *i . were studied pH-metrically at 25°C and I = 1 mol/L (NaCl) in aqueous solution. It was found that logβ *1 = −5.10±0.15 and logβ *2 = −10.25±0.10. For equilibrium AuNH3Clsolid = AuNH3Cl, log K s = −3.1±0.3. Taking into account the protonation constants of ammonia (log K H = 9.40), the obtained results show that for equilibria AuCl −2 + iNH3 = Au(NH3)iCl2 − i + iCl−, logβ1 = 4.3±0.2, and logβ2 = 8.55±0.15. The standard potentials E 1/00 of AuNH3Cl0 and Au(NH3) +2 species are equal to 0.90±0.02 and 0.64±0.01 V, respectively.

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  1. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavren’teva 3, Novosibirsk, 630090, Russia

    I. V. Mironov

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  1. I. V. Mironov
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Original Russian Text © I.V. Mironov, 2007, published in Zhurnal Neorganicheskoi Khimii, 2007, Vol. 52, No. 6, pp. 1032–1034.

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Mironov, I.V. Stability of diammine and chloroammine gold(I) complexes in aqueous solution. Russ. J. Inorg. Chem. 52, 960–962 (2007). https://doi.org/10.1134/S003602360706023X

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  • DOI: https://doi.org/10.1134/S003602360706023X

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