Formation of Complexes of Silver(I) and 2-Mercaptobenzimidazole in Water–Ethanol Solutions

Abstract

The formation of silver(I) complexes with 2-mercaptobenzimidazole (MB) in solutions containing different amounts of ethyl alcohol is studied via potentiometric titration. The acid–base properties of 2‑mercaptobenzimidazole are studied under the same conditions. It is shown that the 2-mercaptobenzimidazole molecule is protonated in the pH range 0.5–2.5. At pH 7–8, an MB molecule is predominantly (99.72%) in the form of a neutral molecule; above pH 11, it exists in the form of a negatively charged ion L. It is found that two complex forms result from the interaction between Ag(I) and MB. The cumulative stability constants of mono- and bis(ligand) complexes of silver are calculated at different concentrations of ethanol in solution. It is found that increasing the percentage of ethanol in a solution enhances the stability of the complexes of silver(I) and MB.

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REFERENCES

  1. 1

    G. A. Novikova, A. K. Molodkin, and S. S. Kukalenko, Zh. Neorg. Khim. 33, 3111 (1988).

    CAS  Google Scholar 

  2. 2

    S. Ch. Gagieva, A. T. Tsaloev, N. A. Gutnova, A. A. Arutyunyants, and A. B. Khubulov, Russ. J. Inorg. Chem. 48, 1182 (2003).

    Google Scholar 

  3. 3

    A. I. Busev, L. N. Lomakina, and T. I. Ignat’eva, Zh. Neorg. Khim. 21, 500 (1976).

    CAS  Google Scholar 

  4. 4

    A. A. Amindzhanov, S. M. Safarmamadov, M. M. Mashali, and Yu. F. Bakhodurov, Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol. 54 (3), 23 (2011).

    CAS  Google Scholar 

  5. 5

    A. A. Amindzhanov, S. M. Safarmamadov, and K. S. Mabatkadamova, Dokl. AN Resp. Tadzhik. 53 (1), 40 (2010).

    Google Scholar 

  6. 6

    S. M. Safarmamadov, Extended Abstract of Doctoral (Chem.) Dissertation (Voronezh, 2008).

  7. 7

    G. V. Moshorin, G. I. Repkin, and V. A. Sharnin, Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol. 50 (10), 29 (2007).

    CAS  Google Scholar 

  8. 8

    A. S. Sodatdinova, Extended Abstract of Cand. Sci. (Chem.) Dissertation (Dushanbe, 2016).

  9. 9

    Ts. K. Migal’ and K. I. Ploae, Zh. Neorg. Khim. 10, 2519 (1965).

  10. 10

    V. V. Udovenko and G. B. Pomerants, Zh. Neorg. Khim. 18, 1773 (1973).

    CAS  Google Scholar 

  11. 11

    G. V. Budu and A. P. Tkhoryak, Zh. Neorg. Khim. 25, 1006 (1980).

    CAS  Google Scholar 

  12. 12

    G. V. Budu, L. V. Nazarova, and A. P. Tkhoryak, Zh. Neorg. Khim. 20, 2094 (1975).

    Google Scholar 

  13. 13

    Z. I. Karimova, Yu. F. Bakhodurov, and K. S. Mabatkadamzoda, in Proceedings of the International Conference on Complex Compounds and Aspects of Their Application (Dushanbe, 2018), p. 95.

  14. 14

    Z. I. Karimova, Yu. F. Bakhodurov, and K. S. Mabatkadamzoda, Dokl. AN Resp. Tadzhik., Nos. 9–10, 759 (2018).

    Google Scholar 

  15. 15

    A. Albert and E. P. Sergeant, Ionization Constants of Acids and Bases (Wiley, London, 1962).

    Google Scholar 

  16. 16

    http://chemanalytica.com/book/novyy_spravochnik_khimika_i_tekhnologa/12_obshchie_svedeniya/6177.

  17. 17

    L. P. Nekrasova, Mezhd. Zh. Prikl. Fundam. Issledov., No. 8–2, 231 (2017).

  18. 18

    E. I. Kapustin, The Solution of Certain Classes of Mathematical Problems in the Program Excel. http://exponenta.ru/educat/systemat/Kapustin/014.asp.

  19. 19

    A. N. Meshkov and G. A. Gamov, Talanta 198, 200 (2019).

    CAS  Article  Google Scholar 

  20. 20

    Complex Formation in Nonaqueous Solutions, Ed. by G. A. Krestov (Nauka, Moscow, 1989) [in Russian].

    Google Scholar 

  21. 21

    G. V. Budu and L. V. Nazarova, Zh. Neorg. Khim. 18, 1531 (1973).

    CAS  Google Scholar 

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Correspondence to S. M. Safarmamadov.

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Translated by E. Boltukhina

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Safarmamadov, S.M., Karimova, Z.I., Bakhodurov, Y.F. et al. Formation of Complexes of Silver(I) and 2-Mercaptobenzimidazole in Water–Ethanol Solutions. Russ. J. Phys. Chem. 94, 1119–1124 (2020). https://doi.org/10.1134/S0036024420060199

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Keywords:

  • silver(I)
  • 2-mercaptobenzimidazole
  • complex formation
  • Gibbs energy
  • cumulative stability constant
  • aqueous–organic solvent