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FORMATION OF HYDROXYL COMPLEXES OF Fe(II) IN AQUEOUS SOLUTIONS

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Eshova G.B., Rahimova M., Davlatshoeva J.A.,

Miraminzoda F.

REVIEWER: Suyariyon K.J.

Candidate of Chemical Sciences,

Associate Professor

 

REFERENCES

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FORMATION OF Fe(II) HYDROXYL COMPLEXES IN AQUEOUS SOLUTIONS

Formation of hydroxyl complexes in the Fe(0)-Fe(II)-glycine-water system from pH at I=0.5 mol/l, temperature 298.15 K, СFe(II)=1×10-4 and СGly=3×10-3 mol/l were studied by the Clark–Nikolsky oxidative potential method. Experimental curves of the dependence of the EMF of the system on the concentrations of hydrogen, iron(II) and glycine ions: рН, рСох, pCL, respectively, are obtained. They allowed us to establish that the processes of complexation in the studied system proceed stepwise in a wide pH range from 1.0 to 8.2. The type and number of coordinated ligands and the total composition of the complex compounds formed were determined. Chemical models of complex formation reactions and model parameters of coordination compounds have been compiled. The values of the angular coefficients, the domain of dominance and the constants of the formation of complexes are determined. The formation of the following coordination compounds is shown: [Fe(OH)(H2O)5]+; [FeHL(H2O)5]2+; [Fe(HL)(OH)(H2O)4]+; [Fe(OH)2(H2O)4]0  and [Fe2(HL)2(OH)2(H2O)8]2+.

                Keywords: EMF, complex, iron (II), glycine, model, ionic strength, oxidative function, iteration.

 

                Information about the authors:  Eshova Chaykhana Bobonazarovna - Tajik National University, Candidate of Chemical Sciences, senior researcher. Address: 734025, Dushanbe Republic of Tajikistan, Rudaki Avenue, 17.  Phone: (+992) 918-23-01-82. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. 

                Davlatshoeva Jahonul Asankhonovna - Tajik National University, Candidate of Chemical Sciences, Associate Professor of the Department of Physical and Colloidal Psychology. Address: 734025, Dushanbe Republic of Tajikistan, Rudaki Avenue, 17.  Phone: (+992) 938-98-96-62. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

                Rahimova Mubashirkhan -Tajik National University, Doctor of Chemical Sciences, Professor. Address: 734025, Dushanbe Republic of Tajikistan, Rudaki Avenue, 17.  Phone: (+992) 918-76-90-70. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Miraminzoda Farida - Tajik National University, scientific Centurion. Address: 734025, Dushanbe Republic of Tajikistan, Rudaki Avenue, 17.  Phone: (+992) 987-27-18-93. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Article received 11.10.2023

Approved after review 06.01.024

Accepted for publication 16.03.2024

   
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