The Stability of Mononuclear and Binuclear Complexes of Silver(I) with Thiosemicarbazide in an Aqueous Solution
| Autor: | O. N. Plakhotnaia, E. F. Fayzulloev, A. S. Samadov, A. N. Kuzmenko, I. G. Gorichev, A. V. Kuzin |
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| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Aqueous solution 030102 biochemistry & molecular biology Chemistry 010401 analytical chemistry General Chemistry 01 natural sciences 0104 chemical sciences Ion Silver electrode 03 medical and health sciences Crystallography chemistry.chemical_compound Thiourea Electroanalytical method |
| Zdroj: | Moscow University Chemistry Bulletin. 76:66-70 |
| ISSN: | 1935-0260 0027-1314 |
| Popis: | The complexation process of silver(I) ions with thiosemicarbazide (Tsc) in a wide range of concentrations of silver(I) and thiosemicarbazide at T = 25.0°C and I = 0.11 M (0.01 M HNO3 + 0.1 M NaNO3) is studied using the potentiometric method with a silver electrode. Mono- and binuclear complexes are present in the solution in the studied region of $$C_{{{\text{Ag}}}}^{ + }$$ (10–5–10–2 M). The predominant forms are Ag2 $${\text{Tsc}}_{2}^{{2 + }}$$ and Ag2 $${\text{Tsc}}_{3}^{{2 + }}$$ . The calculated values of the stability constants of the complexes are as follows: log β11 = 5.58 ± 0.02, log β12 = 10.37 ± 0.06, log β21 = 9.0 ± 0.2, log β22 = 15.8 ± 0.5, log β23 = 20.4 ± 0.3, log β24 = 23.1 ± 0.2, and log β25 = 26.3 ± 0.2. The mono- and binuclear complexes of Ag(I) with thiosemicarbazide are found to be less stable than with thiourea. |
| Databáze: | OpenAIRE |
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