Structure and Unprecedented Reactivity of a Mononuclear Nonheme Cobalt(III) Iodosylbenzene Complex

Jindou Yang, Mi Sook Seo, Kyung Ha Kim, Yong Min Lee, Shunichi Fukuzumi, Jason Shearer, Wonwoo Nam

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21 Scopus citations


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.

Original languageEnglish
Pages (from-to)13581-13585
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number32
StatePublished - 3 Aug 2020

Bibliographical note

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© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim


  • aldehyde deformylation reaction
  • amphoteric reactivity
  • cobalt(III) complexes
  • iodosylbenzene adducts
  • nonheme complexes


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