SYNTHESIS OF BIURET–NITRIC ACID SYSTEMS AT DIFFERENT RATIOS AND THEIR INFRARED SPECTROSCOPIC ANALYSIS
In this study, the structure of systems synthesized based on biuret and nitric acid at different molar ratios (1:0.25; 1:0.5; 1:0.75)
was investigated using infrared (IR) spectroscopy. The obtained results revealed the presence of intermolecular interactions
manifested as shifts in the vibrational frequencies of the N–H, C=O, and N=O functional groups. It was established that with an
increase in the content of nitric acid, hydrogen bonding becomes stronger, proton exchange processes occur, and structural
reorganization of the system takes place. The most pronounced changes were observed at the 1:0.75 ratio. The results of the study
are of significant importance for substantiating the complex structure of these systems and their potential practical applications.
1. Gross A. et al. Biuret - a crucial reaction intermediate: crystal-structure elucidation and in situ diffractometric, vibrational
and thermal characterisation // Chemistry - A European Journal. – 2020. – Vol. 26. – P. 14366–14376.
2. Kedzia B.B., Armendarez P.X., Nakamoto K. Infra-red spectra and normal co-ordinate analyses of metal biuret complexes //
Journal of Inorganic and Nuclear Chemistry. – 1968. – Vol. 30, No. 3. – P. 849–860.
3. Xoliqova G.Q., Avezov Q.G‘., Ganiyev B.Sh., Mardonov O‘.M. Mochevina nitrat tuzi va nitrat kislotalar bilan qayta
ishlangan fosforitlarining rentgen fazaviy tahlili // ФарДУ хабарлари. – Фарғона, 2023. – № 4. – Б. 56-59.
4. Xoliqova G.Q., Mardonov Oʻ.M., Ganiyev B.Sh. Mochevina nitrat tuzlarining korroziya ingibitorlik xossalari // Journal of
Science, Research and Teaching, 2024. Vol. 3. – № 12. – P. 123-132.
5. Kholikova G.K., Mardonov U.M., Tursunova I.N., Ganiyev B.Sh., Khozhiev Sh.T. Synthesis and study of the agrochemical
properties of urea salts with nitric and ortophosphoric acid // E3S Web of Conferences, 2023. – № 389. – P. 03005, 1-7.
6. Xoliqova G.Q., Narzullayeva M.R., Mardonov O‘.M., Ganiyev B.Sh. Biuret va metafosfat kislotalari molekulyar
komplekslari IQ-spektroskopik tahlili / “TAFAKKUR VA TALQIN” mavzusidagi Respublika miqyosidagi ilmiy-amaliy
anjuman to‘plami. – Buxoro, 2025. 15-may. – B. 92-95.
7. Ilyukhin A.B. et al. Synthesis, IR spectra, and structures of double metaphosphates MNi(PO3)3 (M = Na or K) // Russian
Journal of Inorganic Chemistry. – 2003. – Vol. 48. – P. 1501–1506.
8. Kholikova G.K., Mardonov U.M., Ganiev B.Sh. Synthesis, spectroscopic characterization and theoretical investigation of
biuret-metaphosphate molecular complexes: a combined experimental and DFT study // Oriental journal of medicine and
natural sciences, 2025. Vol. 2. – № 4. – P. 34-45.
9. Mardonov O‘.M., G.Q.Xoliqova, Ganiyev B.Sh. Mochevina va biuret asosidagi kompleks birikmalar tadqiqotlari”.
Monografiya. Toshkent: Kamolot, 2025. – 200 b.
10. McCurdy P. R., Hess W. P., Xantheas S. S. Nitric acid− water complexes: theoretical calculations and comparison to
experiment //The Journal of Physical Chemistry A. – 2002. – Т. 106. – №. 33. – С. 7628-7635.
11. Matulková I., Mathauserová J., Císařová I., Němec I., Fábry J. Crystal structures and vibrational spectra of biuret co-crystals
with cyanuric and glutaric acids, discussion of hydrogen bonding involving carbonyl groups //Zeitschrift für KristallographieCrystalline Materials. – 2016. – Т. 231. – №. 5. – С. 291-300
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