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Structure and Catalytic Properties of Novel Copper Isatin Schiff Base Complexes

Abstract

Isatin Schiff base ligands in combination with redox active metal ions have potential to behave as non-innocent ligands facilitating industrially important chemical reactions. Ligand structure is easily modified by introducing substituents in three different positions affecting electron density distribution that was evaluated by Mulliken charge analysis and cyclic voltamperometry for a list isatin derivatives. It was noticed that coordination of these ligands to copper(II) bromide in alcohol resulted in copper reduction to Cu(I) species and alcohol oxidation. Compared to organic chemistry, inorganic chemistry for these ligands remains poorly examined. Here we present the structural study of sixteen novel copper complexes with mononuclear [Cu(L)2]Hal2/1 and halo-bridged binuclear [Cu2(mu-Hal)2(L)2] structures (L = isatin Schiff base ligand; Hal = Cl, Br and I). Finally, application of the above complexes for alcohol oxidation was evaluated: complexes selectively catalyse benzyl alcohol oxidation to the corresponding aldehyde with almost quantitative yields and high selectivity.

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Publication details

The article was received on 01 Jun 2018, accepted on 27 Oct 2018 and first published on 02 Nov 2018


Article type: Paper
DOI: 10.1039/C8NJ02718H
Citation: New J. Chem., 2018, Accepted Manuscript
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    Structure and Catalytic Properties of Novel Copper Isatin Schiff Base Complexes

    A. Smirnov, L. M. Martins, D. Nikolaev, R. Manzhos, V. V. Gurzhiy, A. G. Krivenko, K. Nikolaenko, A. Belyakov, A. Garabadzhiu and P. Davidovich, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ02718H

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