Abstract
Five-coordinate oxorhenium(V) anions with redox-active catecholate ligands deoxygenate stable nitroxyl radicals, including TEMPO(*), to afford dioxorhenium(VII) complexes and aminyl radical-derived products. A structural homologue with redox-inert oxalate ligands does not react with TEMPO(*). Redox-active ligands are proposed to lower the kinetic barrier to TEMPO(*) deoxygenation by giving access to 1e(-) redox steps that are crucial for the formation and stabilization of intermediate species.
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