Synthesis of chromium complexes with hydrocarbon and heterocyclic ligands and their application in polymerization processes and gas-phase production of chromocarbide films in the works of A.N. Artemov

In the works of Professor A.N. Artemov, the synthesis of chromium-containing isoxazolines by the reaction of 1,3-lipolar cycloaddition was studied and an increase in cis/trans selectivity was demonstrated when introducing a tricarbonylchromium group into molecules of dipoles and dipolarophiles. Arentricarbonylchromium derivatives of six-membered heterocycles with N-C-O bonds, like their five-membered analogues, can be obtained by reaction between heterocycles free of the tricarbonylchromium group, as well as a result of condensation of chromium-containing amino alcohols with carbonyl compounds. The synthesis of bi- and polymetallic compounds in the reactions of organometallic halides with various non-transition metals has been studied. Such reactions make it possible in a one-step process to obtain compounds containing covalent bonds of metals of 12-15 groups (Mg, Zn, Cd, In, Tl, Sn, Pb, Bi) with non-transitive elements (Fe, Mo, W). Styrene chromium tricarbonyl, para -methylstyrene chromium tricarbonyl, α-methylstyrene chromium tricarbonyl, stilbene chromium tricarbonyl, allylbenzene chromium tricarbonyl, and diphenylbutadiene chromium tricarbonyl were studied as polymerization regulators by the mechanism of reversible inhibition for vinyl monomers. α-methylstyrene chromium tricarbonyl, diphenylbutadiene chromium tricarbonyl, allylbenzene chromium tricarbonyl. When they are introduced into the polymerizing mass of methyl methacrylate, butyl acrylate, styrene in quantities commensurate with the concentration of the initiator, they control the termination of the polymer chain at temperatures not exceeding 100 °C. At the same time, the process proceeds at a sufficiently high rate, and the control of chain growth follows the mechanism of reversible inhibition. The gas-phase decomposition of bis -ethylbenzenechromium can proceed with the formation of hard and wear-resistant chromium carbide coatings, as well as with the production of chromium films characterized by a low temperature resistance coefficient.