Skip to main content
SpringerLink
Log in

Thermodynamic Characteristics of the Formation of Iron(II) and Iron(III) Complexes with L-Alanine in Aqueous Solutions

  • PHYSICAL CHEMISTRY OF SOLUTIONS
  • Published:
Russian Journal of Physical Chemistry A Aims and scope Submit manuscript

Abstract

The Clark–Nikolsky oxidation potential is used to study the formation of iron(II) and iron(III) coordination compounds in aqueous solutions of α-alanine at a temperature of 298.15 K and an ionic strength of the (Na(H)ClO4) solution of 1.0 mol/L. Experimental curves of dependences of the EMF of the system on the concentration parameters of hydrogen, iron(III), iron(II), and α-alanine ions (pH, рСох, рСred, and pCL, respectively) are recorded. The curves show that complexation in the studied system proceeds stepwise in the wide range of pH 0.5–9.0. Mononuclear coordination compounds [FeHL(H2O)5]3+, [Fe(HL)2(H2O)4]3+, [Fe2(HL)2(OH)4(H2O)6]2+, [FeHL(H2O)5]2+, [Fe(HL)(OH)(H2O)4]+, and [Fe(HL)(OH)2(H2O)3]0 and a heterovalent [FeIIFeIII(HL)2(OH)4(H2O)6]+ complex form. The type and number of coordinated ligands and cations and the total composition of the resulting complex compounds are determined. Chemical models complexation are compiled, and the regions of their dominance are determined.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.

Similar content being viewed by others

REFERENCES

  1. L. R. Nozdryukhina, The Biological Role of Trace Elements in the Body of Animals and Humans (Nauka, Moscow, 1977) [in Russian].

    Google Scholar 

  2. T. N. Litvinova, Biogenic Elements. Complex Compounds (Feniks, Rostov-on-Don, 2009) [in Russian].

    Google Scholar 

  3. W. M. Clark, Oxidation-Reduction Potentials of Organic Systems (Williams and Wilkins, Baltimore, 1960).

    Google Scholar 

  4. B. P. Nikol’skii, Oxredmetry (Khimiya, Leningrad, 1975) [in Russian].

    Google Scholar 

  5. M. S. Zakhar’evskii, Oxredmetry (Khimiya, Leningrad, 1968) [in Russian].

    Google Scholar 

  6. M. M. Rakhimova, T. M. Nurmatov, N. Z. Yusupov, M. A. Ismailova, and E. Faizullaev, Russ. J. Inorg. Chem. 58, 719 (2013).

    Article  CAS  Google Scholar 

  7. J. A. Davlatshoeva, G. B. Eshova, M. Rahimova, et al., Am. J. Chem. 7, 58 (2017).

    CAS  Google Scholar 

  8. G. B. Eshova, J. A. Davlatshoeva, M. Rahimova, L. V. Kvyatkovskaya, and M. O. Guriev, Russ. J. Inorg. Chem. 63, 561 (2018).

    Article  CAS  Google Scholar 

  9. G. B. Eshova, J. A. Davlatshoeva, M. Rahimova, M. O. Guriev, and L. V. Kvyatkovskaya, Russ. J. Inorg. Chem. 63, 772 (2018).

    Article  CAS  Google Scholar 

  10. M. Rakhimova, G. B. Eshova, D. A. Davlatshoeva, L. V. Kvyatkovskaya, and F. Miraminzoda, Russ. J. Phys. Chem. A 94, 1560 (2020).

    Article  CAS  Google Scholar 

  11. J. C. Schumacher, Perchlorates Their Properties, Manufacture and Uses (Nabu Press, USA, 2011).

    Google Scholar 

  12. R. Přibil, Komplexony v chemicke analyze (NCSAV, Praha 1957).

    Google Scholar 

  13. V. L. Zavorotnyi and N. A. Kalacheva, Methodical Guide to Laboratory Work in Analytical Chemistry. Titrimetric Analysis (RGU Nefti Gaza Gubkina, Moscow, 2007) [in Russian].

    Google Scholar 

  14. V. M. Suslennikova and E. K. Kiseleva, Guidelines for the Preparation of Titrated Solutions (Khimiya, Leningrad, 1968) [in Russian].

    Google Scholar 

  15. R. J. Bates, Determination of pH—Theory and Practice (Wiley, New York, 1964).

    Google Scholar 

  16. Z. N. Yusupov, Resp. Tadzhik. Patent TJ 295, No. 97000501, Byull. Izobret., No. 21 (2000).

Download references

Funding

This work was performed as part of a project of the Research Institute of the Tajik National University.

Author information

Authors and Affiliations

  1. Research Institute, Tajik National University, 734025, Dushanbe, Tajikistan

    G. B. Eshova, M. Rakhimova & F. Miraminzoda

  2. Tajik National University, 734025, Dushanbe, Tajikistan

    Dzh. A. Davlatshoeva

  3. Pedagogical Institute, 734025, Garm, Tajikistan

    M. A. Toirzoda

Authors
  1. G. B. Eshova
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Dzh. A. Davlatshoeva
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. M. Rakhimova
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. F. Miraminzoda
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. M. A. Toirzoda
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to G. B. Eshova.

Ethics declarations

The authors declare that they have no conflict of interest.

Additional information

Translated by M. Timoshinina

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Eshova, G.B., Davlatshoeva, D.A., Rakhimova, M. et al. Thermodynamic Characteristics of the Formation of Iron(II) and Iron(III) Complexes with L-Alanine in Aqueous Solutions. Russ. J. Phys. Chem. 97, 2443–2448 (2023). https://doi.org/10.1134/S0036024423110079

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S0036024423110079

Keywords:

Search

Navigation