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Molecular structure and catechol oxidase activity of a new copper(I) complex with sterically crowded monodentate N-donor ligand |
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| Authors: | Ádám Kupán Gábor Speier Michel Giorgi Ferenc Pollreisz |
| Institution: | a Department of Chemistry, University of Pannonia, H-8200 Veszprém, Hungary b Laboratoire de Cristallochimie et Laboratoire de Bioinorganique Structurale Université Paul Cézanne Aix-Marseille III F.S.T. Saint-Jérôme, Service 432, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France c Biosciences, Université Paul Cézanne Aix-Marseille III F.S.T. Saint-Jérôme, Service 432 Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France d Institute of Structural Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary |
| Abstract: | The attempted alkylation of 1,3-bis(2′-pyridylimino)isoindoline (indH) by the use of n-BuLi and subsequent alkyl halides led to quaternization of the pyridine nitrogens and the zwitterionic monodentate N-ligand (Me2ind)I was formed. By the use of the ligand the copper(I) complex CuI(Me2ind)I2] was prepared and its structure determined. It was found to be good catalyst for the oxidation of 3,5-di-tert-butylcatechol (DTBCH2) to 3,5-di-tert-butyl-1,2-benzoquinone (DTBQ) and H2O2 by dioxygen. Detailed kinetic studies revealed first-order dependence on the catalyst and dioxygen concentration and saturation type behavior with respect to the substrate. |
| Keywords: | Catechol Catechol oxidase Biomimetic oxidation Copper complexes N-ligand |
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