Catalytic oxidation of cyclohexane with hydrogen peroxide and a tetracopper(II) complex in an ionic liquid

Da Costa Ribeiro, Ana Paula; Martins, Luisa; HAZRA, SUSANTA; Pombeiro, Armando

http://hdl.handle.net/10400.21/5831

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Authors

Da Costa Ribeiro, Ana Paula

Martins, Luisa

HAZRA, SUSANTA

Pombeiro, Armando

Abstract(s)

The catalytic peroxidative oxidation (with H2O2) of cyclohexane in an ionic liquid (IL) using the tetracopper(II) complex [(CuL)2(μ4-O,O′,O′′,O′′′-CDC)]2·2H2O [HL = 2-(2-pyridylmethyleneamino)benzenesulfonic acid, CDC = cyclohexane-1,4-dicarboxylate] as a catalyst is reported. Significant improvements on the catalytic performance, in terms of product yield (up to 36%), TON (up to 529), reaction time, selectivity towards cyclohexanone and easy recycling (negligible loss in activity after three consecutive runs), are observed using 1-butyl-3-methylimidazolium hexafluorophosphate as the chosen IL instead of a molecular organic solvent including the commonly used acetonitrile. The catalytic behaviors in the IL and in different molecular solvents are discussed.

Keywords

Tetranuclear copper complex Catalysis Alkane functionalization Peroxidative oxidation of cyclohexane Ionic liquid Electrochemistry Ionic conductivity

URI

http://hdl.handle.net/10400.21/5831

Citation

RIBEIRO, Ana P. C.; [et al.] - Catalytic oxidation of cyclohexane with hydrogen peroxide and a tetracopper(II) complex in an ionic liquid. Comptes Rendus Chimie. ISSN.1631-0748 . Vol. 18, N.º 7 (2015), pp. 758-765