Formation and Characterization of the Iridium Tetroxide Molecule with Iridium in the Oxidation State +VIII

Authors

  • Yu Gong,

    1. Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Advanced Materials Laboratory, Fudan University, Shanghai 200433 (China), Fax: (+86) 21-6564-3532
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  • Mingfei Zhou Prof. Dr.,

    1. Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Advanced Materials Laboratory, Fudan University, Shanghai 200433 (China), Fax: (+86) 21-6564-3532
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  • Martin Kaupp Prof. Dr.,

    1. Institut für Anorganische Chemie der Universität Würzburg, Am Hubland, 97074 Würzburg (Germany)
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  • Sebastian Riedel Dr.

    1. Institut für Anorganische und Analytische Chemie, Albert-Ludwigs Universität Freiburg, Albertstrasse 21, 79104 Freiburg i. Br. (Germany), Fax: (+49) 761-203-6001
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  • We are grateful to D. Himmel for stimulating discussions. This work was supported by the National Basic Research Program of China (2007CB815203) and the National Natural Science Foundation of China (20773030). S.R. thanks the Alexander von Humboldt Foundation and the DFG for research fellowships.

Abstract

original image

In einer festen Edelgasmatrix inserieren Iridiumatome in Disauerstoff unter Bildung von Iridiumdioxid-Molekülen. Beim Erwärmen entsteht der Iridium(dioxid)superoxid-Komplex [(η1-O2)IrO2], der unter IR-Bestrahlung zum Iridium(dioxid)peroxid-Komplex [(η2-O2)IrO2] isomerisiert. Beide Komplexe lagern sich photochemisch in das stabilere Iridiumtetraoxid-Molekül um, in dem Ir die Oxidationsstufe +VIII annimmt (siehe Schema; Ir schwarz, O rot).

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