Authors: T.G. Cherkasova, A.V. Tikhomirova, N.A. Zolotukhina, E.V. Cherkasova, E.S. Tatarinova, D.A. Barantsev

Title of the article: Molecular complexes of the first transition metals: synthesis and structure

Year: 2020, Issue: 6, Pages: 32-39

Branch of knowledge: 05.17.01 Technology of inorganic substances

Index UDK: 54.386.

DOI: 10.26730/1999-4125-2020-6-32-39

Abstract: Coordination compounds are a very broad and diverse class. The most important processes of life are not complete without the participation of complex compounds of complex structure. Examples include insulin, hemoglobin, vitamin B12, and many others. The article describes the conditions of synthesis, structure, and physicochemical properties of coordination compounds of some first-transition metals and lanthanoids with various organic ligands: dimethylsulphoxide, dimethylflormamide, ε-caprolactam, and nicotinamide. The composition, structure and properties of compounds are determined using chemical, physico-chemical, and analytical methods. Chemical and x-ray fluorescence analyses were performed to determine the composition of the complexes. Their solubility and stability in various solvents were determined. The structure of substances was determined using IR spectroscopy, x-ray diffraction and x-ray phase analysis. The coordination of the ligands to the ion-complexing agents was established. Substances are crystalline, some of them have a polymer structure, and some have an ionic structure. A number of compounds, being isostructural, show the same diffraction pattern and a regular shift of interplane distances depending on the ionic radii of the elements. A comparative analysis of the dependence of the structure of binuclear complex compounds on the electronic structure of complex-forming metals, as well as on the structure of ligands was performed.

Key words: complex compounds d-metals lanthanoids dimethyl-sulfoxide dimethylformamide nicotinamide ε-caprolactam HSAB

Receiving date: 10.12.2020

Publication date: 29.12.2020

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