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Fabio Marchetti, Calogero Pinzino, Stefano Zacchini and Guido Pampaloni Long-Lived Radical Cations of Monocyclic Arenes at Room Temperature Obtained by NbF5 Acting as an Oxidizing Agent and Counterion Precursor Angewandte Chemie International Edition 49

Version of Record online: 10 MAY 2010 | DOI: 10.1002/anie.201001572

Thumbnail image of graphical abstract

Salt of the earth: Radical cation salts of monocyclic arenes, including benzene, have been obtained in a reaction where niobium pentafluoride behaves both as an oxidizing agent (conversion into NbF4) and fluoride acceptor (to afford the counterion [Nb2F11], see picture). Anion–π-electron density interactions, as revealed by experimental and computational studies, are crucial in providing unprecedented inertness to the radical cations.

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