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Information × Registration Number 0221U101689, 0119U001489 , R & D reports Title Development of new highly efficient catalysts of the substitution reactions of haloarenes for the solution of environmental and "green" chemistry problems. popup.stage_title Head Korotkikh Mykola I., Доктор хімічних наук Registration Date 24-01-2021 Organization Institute of Physical and Organic Chemistry and Coal Chemistry. LM Litvinenko of the National Academy of Sciences of Ukraine popup.description2  Object of study. New stable highly electron donating carbenes and olefins, their precarbene and carbenoid forms of mono- and polynuclear type with steric protection of carbene center for creation of highly efficient catalysts of reductive dehalogenation reaction of haloarenes. The aim of the work is the synthesis of new stable carbenes and nucleophilic olefins with high electron donating ability, their precursors and complexes with metals. Study of catalytic efficiency of metalcarbene complexes in hydrodehalogenation reactions of haloarenes and reduction of multiple bonds by alcohols in alkaline medium. Research methods - synthetic, spectral (NMR spectroscopy), analytical (chromatographic, elemental analysis), computational (quantum chemical research). Research results: By the DFT method new criteria of philicity - indexes Ie, Pp, have been developed, which are used in the design of carbene structures for catalysis. Synthesis of bis- (1,3-dimesitylimidazolinium) methane and nucleophilic allene based on it, nucleophilic olefin -1,3-dimesityl-2-methylenephenanthro[9,10-d]imidazoline, complexes of superbasic carbenes of a series of vic-triazole and titanium or tin. The structure of complexes and salts of fluoro-substituted 1,2,4-triazol-5-ylidenes, 1,3-dimesityl-2-methylenephenanthro[9,10-d]imidazoline was studied. The high catalytic effect of 1,3-diphenyl-4-(2,6-diisopropylphenyl)-1,2,4-triazol-5-ylidene in the hydrodehalogenation reaction of p-dichlorobenzene with isopropanol in the presence of potassium tert-butoxide at 80o C (TON 46000). The complex of 1,3-dimesityl-2-methylenephenanthro[9,10-d]imidazoline and palladium iodide shows lower catalytic efficiency (TON 2000). The obtained precarbenes are promising starting compounds for the synthesis of highly efficient catalysts of organic reactions. Field of application - synthesis of stable carbenes and their carbenoid forms, catalysis of organic reactions. Product Description popup.authors Yenya Vasyl І. Korotkikh Mykola I. Rayenko Gennady F. popup.nrat_date 2021-01-24 Close