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COMPLEXATION OF IRON(III) WITH TSC AND FTSC IN H2SO4 SOLUTIONS OF VARIABLE COMPOSITION

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Bobokalonov T.B., Hakimov F.Kh., Safarmamadzoda S.M.,

Mamadgaminova Z.R.

REVIEWER: Suyariyon K.J.,

Candidate of Chemical Sciences,

Associate Professor

REFERENCES

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COMPLEXATION OF IRON (III) WITH TSC AND FTSC IN H2SO4 SOLUTIONS OF

VARIABLE COMPOSITION

 The process of complex formation of iron (III) with thiosemicarbazide and 1-formyl-3-thiosemicarbazide in H2SO4 solutions of various concentrations was studied using the potentiometric method. The stability constants of the resulting complexes were calculated, and the ionization constants of the ligands were estimated under the same conditions. It was shown that the stepwise nature of complex formation does not depend on the concentration of hydrogen ions. However, the stability of the complexes decreases with increasing pH. A study of the complex formation of iron(III) with thiosemicarbazide and its acyl derivative showed that there are both similarities and differences in the nature of complex formation. Both ligands react with iron(III) in a stepwise manner, forming stable complexes. With increasing temperature, the stability of the complexes increases. Changing the ionic strength of the solution and the concentration of H2SO4 equally affect the stability of the complexes. At the same time, moving from thiosemicarbazide to 1-formyl-3-thiosemicarbazide, the number of particles formed in the solution decreases, and the stability of the complexes decreases.

Keywords: complexation, iron(III), TSC-thiosemicarbazide, FTSC-1-formyl-3-thiosemicarbazide, stability constants, thermodynamic functions.

               

                Infarmation about the authors:  Bobokalonov Tojiddin Barotmakhmadovich - Tajik National University, Candidate of Chemical Sciences, Senior Lecturer  of the Department of Analytical Chemistry. Address: 734025, Dushanbe city, Republic of Tajikistan, Rudaki Avenue, 17. Phone:  (+992) 918157026. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Hakimov Firuz Kholikovich - Samarkand State University named after Sharof Rashidov, Candidate of Chemical Sciences, Associate Professor  of the Department of Physical and Colloid Chemistry. Address: 140104, Samarkand, Republic of Uzbekistan, University Boulevard, 15. Phone:  (+998) 915444450. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

                Safarmamadzoda Safarmamad Muboraksho - Tajik National University,  Doctor of Chemical Sciences, Professor of the Department of Inorganic Chemistry. Address: 734025, Dushanbe city, Republic of Tajikistan, Rudaki Avenue, 17. Phone:  (+992) 938270404. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

                Mamadgaminova Zebo Rahmatshoevna – Tajik National University, second-year master's student of the Department of Inorganic Chemistry. Address: 734025, Dushanbe city, Republic of Tajikistan, Rudaki Avenue, 17. Phone:  (+992) 900550898. E-mail: mamadgaminovazeboThis email address is being protected from spambots. You need JavaScript enabled to view it.com.   

 

Article received 02.01.2024

Approved after review 22.02.2024

Accepted for publication 12.04.2024

   
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