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Updated: Dec 22, 2025

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Published on: March 19, 2020
Structure and Unprecedented Reactivity of a Mononuclear Nonheme Cobalt(III) Iodosylbenzene Complex
Jindou Yang1, Mi Sook Seo1, Kyung Ha Kim1
1Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 03760, Korea.
Abstract:
A mononuclear nonheme cobalt(III) iodosylbenzene complex, [CoIII (TQA)(OIPh)(OH)]2+ (1), is synthesized and characterized structurally and spectroscopically. While 1 is a sluggish oxidant in oxidation reactions, it becomes a competent oxidant in oxygen atom transfer reactions, such as olefin epoxidation, in the presence of a small amount of proton. More interestingly, 1 shows a nucleophilic reactivity in aldehyde deformylation reaction, demonstrating that 1 has an amphoteric reactivity. Another interesting observation is that 1 can be used as an oxygen atom donor in the generation of high-valent metal-oxo complexes. To our knowledge, we present the first crystal structure of a CoIII iodosylbenzene complex and the unprecedented reactivity of metal-iodosylarene adduct.
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