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Complexation Equilibria of Silver(I) Ions with N-Phenylthiourea in Aqueous Solutions

  • PHYSICAL CHEMISTRY OF SOLUTIONS
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Abstract

Complexation between silver(I) ions and N-phenylthiourea is studied over a wide range of silver(I) and N-phenylthiourea (L) concentrations at 25.0°C and ionic strength I = 0.11 M (0.01 M HNO3 + 0.1 M NaNO3) by potentiometric titration using a silver electrode. Mono- and binuclear complexes are present in the studied concentration range of Ag+ ions (1 × 10–5–1 × 10–3 mol/L). \({\text{A}}{{{\text{g}}}_{{\text{2}}}}{\text{L}}_{3}^{{2 + }}\) is the dominant species. At CL/CAg > 1, the content of mononuclear species is much lower than that of binuclear ones. The calculated overall stability constants of the complexes are as follows: log β11 = 5.58, log β12 = 10.75, log β21 = 10.1, log β22 = 17.1, log β23 = 23.2, log β24 = 25.9, and log β25 = 29.2.

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Authors and Affiliations

  1. Moscow State Pedagogical University, 129164, Moscow, Russia

    A. S. Samadov, I. G. Gorichev & A. F. Stepnova

  2. Nikolaev Institute of Inorganic Chemistry, 630090, Novosibirsk, Russia

    I. V. Mironov

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  1. A. S. Samadov
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  2. I. V. Mironov
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  3. I. G. Gorichev
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  4. A. F. Stepnova
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Correspondence to A. S. Samadov.

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Translated by D. Terpilovskaya

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Samadov, A.S., Mironov, I.V., Gorichev, I.G. et al. Complexation Equilibria of Silver(I) Ions with N-Phenylthiourea in Aqueous Solutions. Russ. J. Inorg. Chem. 65, 1081–1084 (2020). https://doi.org/10.1134/S0036023620070177

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