Previous article Next article Contents  

A. S. Samadov, I. G. Gorichev, A. N. Kuzmenko, O. N. Plakhotnaia, A. V. Kuzin, E. F. Fayzulloev

Stability of mononuclear and binuclear complexes of silver(I) with thiosemicarbazide in aqueous solution


The complexation of silver(I) ions with thiosemicarbazide in a wide range of silver(I) and thiosemicarbazide (Tsc) concentrations at T = 25.0 C and I = 0.11 M (0.01 M HNO3 + 0.1 M NaNO3) was studied using the potentiometric method with a silver electrode. In the studied region of CAg + (11051102M), mono- and binuclear complexes are present in the solution. The dominant form is Ag2Tsc22+ and Ag2Tsc32+. The calculated values of the total stability constant of the complexes: 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 log β25 = 26.3 0.2. The mono- and binuclear complexes of silver(I) with thiosemicarbazide were found to be less stable than with the thiourea complex.
Key words: complexation, silver(I) ions, thiosemicarbazide, mononuclear and binuclear complexes, stability constant, potentiometry.
Moscow University Chemistry Bulletin.
2021, Vol. 62, No. 2, P. 152

Copyright (C) Chemistry Dept., Moscow State University, 2002
   Editorial board
   Tables of Contents

The site is supported by Russian Foundation for Basic Research
  The using of published on this page materials is not allowed without special permission
Copyright (C) Chemisty Department of Moscow State University
Web-Editor: B.I.Pokrovskii
Web-design: Copyright (C) MIG and VVM