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COMPLEX COMPOUNDS OF MAGNESIUM NITRATE WITH AMIDES

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Research is currently underway in the world to develop the conditions for the synthesis of highly effective and complex-acting stimulants. In this regard, an important task is to justify the creation of stimulants that increase the yield of plants, accelerating physiological processes, including the development of optimal conditions for synthesis and production; determination of the composition and structure of coordination compounds of calcium ions with magnesium with polydentate organic ligands - amides; determination of the nature of the coordination bond in the coordination of ligands to the central ion and in the mutual substitution of ligands, as well as determination of the thermal stability of the synthesized compounds. Purpose. Determination of synthesis conditions, establishment of the composition and structure of coordination compounds of amides and nicotinamide with magnesium nitrate. Study of the thermal behavior of mixed amide coordination compounds of magnesium nitrate. Methodology. Differential thermal analysis, X-ray phase analysis, IR spectroscopy, elemental analysis. Originality. For the first time, two new coordination compounds of magnesium nitrate with HCONH2, CS(NH2)2, NС4Н5CONH2 were synthesized. By the methods of x-ray phase analysis, IR spectroscopy, the individuality of the synthesized complex compounds, methods of coordination of ligands, nitrate groups and the geometry of the coordination site are established. The thermal behavior of the synthesized compounds was studied and thermolysis products were identified. Findings. The composition of the synthesized compounds was determined by elemental analysis. By comparing the interplanar distances and relative intensities of the free molecules of formamide, thiocarbamide, nicotinamide, magnesium nitrate monohydrate and synthesized coordination compounds, the identity of compounds of the compositions Mg(NO3)2·CS(NH2)2·NС4Н5CONH2·H2O, Mg(NO3)2· HCONH2·NС4Н5CONH2·H2O is proved. Based on the data of IR spectroscopy, it was found that the formamide molecules and nitrate acid anions are coordinated through the oxygen atom and nicotinamide is coordinated through the oxygen atom of the carbanyl group, and thiocarbamides are coordinated through the sulfur atom.Highlights: - mechanochemical method obtained complex compounds magnesium nitrate. - synthesis of mixed ligand coordination compounds of magnesium nitrates; - electronic structure and reactivity are determined.

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# координация# coordination# X-ray phase analysis# рентгенофазовый анализ# индивидуаллик# индивидуальность# individuality# центральный атом# марказий атом# central atom# рентгенфазавий таҳлил# оординация

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https://eroi.uz/11.0030/A0921-0034

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