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Copper(II) complexes of arylhydrazone of 1H-indene-1,3(2H)-dione as catalysts for the oxidation of cyclohexane in ionic liquids

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Resumo:The copper(II) complexes [CuL(H 2 O) 2 ]·H 2 O (1) and [CuL(dea)] (2) [L = 2-(2-(1,3-dioxo-1H-inden-2(3H)-ylidene)hydrazinyl)benzenesulfonate, dea = diethanolamine] were applied as catalysts in the peroxidative (with tert-butyl-hydroperoxide or hydrogen peroxide) conversion of cyclohexane to cyclohexanol and cyclohexanone, either in acetonitrile or in any of the ionic liquids [bmim][NTf 2 ] and [hmim][NTf 2 ] [bmim = 1-butyl-3-methylimidazolium, hmim = 1-hexyl-3-methylimidazolium, NTf 2 = bis(trifluoromethanesulfonyl) imide]. Tert-butyl-hydroperoxide led to better product yields, as compared to H 2 O 2 , with a selectivity directed towards cyclohexanone. The ILs showed a better performance than the conventional solvent for the copper complex 1. No catalytic activity was observed for 2 in the presence of an IL.
Autores principais:Tiago, Gonçalo A. O.
Outros Autores:Ribeiro, Ana P. C.; Silva, M. Fátima C. Guedes da; Mahmudov, Kamran T.; Branco, Luís C.; Pombeiro, Armando J. L.
Assunto:Arylhydrazones Catalysis Copper Cyclohexane oxidation Ionic liquids Catalysis Physical and Theoretical Chemistry
Ano:2018
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade Nova de Lisboa
Idioma:inglês
Origem:Repositório Institucional da UNL

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