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Frank D. Lesh, Richard L. Lord, Mary Jane Heeg, H. Bernhard Schlegel and Cláudio N. Verani Unexpected Formation of a Cobalt(III) Phenoxazinylate Electron Reservoir European Journal of Inorganic Chemistry 2012

Version of Record online: 20 DEC 2011 | DOI: 10.1002/ejic.201101352

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An unexpected aerobic cyclization of the popular redox active N,N′-bis(3,5-di-tert-butyl-2-hydroxyphenyl)-1,2-phenylenediamine ligand occurs in the presence of a cobalt(II) salt to form a new mixed phenolate/phenoxazinylate radical species. Experimental and computational studies elucidate the properties of the resultant bisligated cobalt(III) complex that traverses redox levels from 2+ to 3–.

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