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Catalytic oxidation of a model volatile organic compound (toluene) with tetranuclear Cu(II) complexes

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Abstract(s)

A tetranuclear Cu(II) cubane [Cu-2(mu-1 kappa ONO':2 kappa OO':3 kappa O-HL)(mu-1 kappa ONO':2 kappa OO'-HL)](2).4dmf (1) derived form (2,3-dihydroxybenzylidene)-2-hydroxybenzohydrazide (H3L) was synthesized at room temperature and characterized by elemental analysis, IR spectroscopy, ESI-MS and single crystal X-ray diffraction. The known tetranuclear Cu(II) open-cubane [Cu(HL)](4).4EtOH (2) was synthesized from the same pro-ligand following a similar method or the reported one. The different tautomeric forms (keto and enol) of the organic ligands in 1 and 2 explain their different structural features. Both complexes were screened as catalysts for the peroxidative oxidation of toluene with tert-butyl hydroperoxide, achieving benzaldehyde and o-cresol as the main products. Complex 1 exhibits the highest activity (maximum product yield of 11%).

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Cu(II) complexes Aroylhydrazone X-ray structure Oxidation of toluene Peroxidative oxidation

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SUTRADHAR, Manas; [et al] – Catalytic oxidation of a model volatile organic compound (toluene) with tetranuclear Cu(II) complexes. Inorganica Chimica Acta. ISSN 0020-1693. Vol. 520 (2021), pp. 1-7

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Elsevier

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