Synthesis and reactivity of a mononuclear non-haem cobalt(IV)-oxo complex

Authors

Bin Wang (1st author, Ewha Womans Univ), Yong-Min Lee (Ewha Womans Univ), Woon-Young Tcho (Ewha Womans Univ), Samat Tussupbayev (IBS, KAIST), Seoung-Tae Kim (IBS, KAIST), Yujeong Kim (KBSI), Mi Sook Seo (Ewha Womans Univ), Kyung-Bin Cho (Ewha Womans Univ), Yavus Dede (Gazi Univ), Brenna C. Keegan (Nevana Univ), Takashi Ogura (Hyogo Univ), Sun Hee Kim (KBSI), Takehiro Ohta (Hyogo Univ), Mu-Hyun Baik (IBS, KAIST), Kallol Ray (Humboldt-Universitat zu Berlin), Jason Shearer (Nevana Univ), Wonwoo Nam (Ewha Womans Univ)

Abstract

The structure and reactivity of cobalt-oxo complexes that act as short-lived reaction intermediates with a high-valent oxidation state are elucidated. The CW/pulse EPR system at Western Seoul Center was used to observe changes of the oxidation state of metal-oxo species directly in the catalytic reaction.

Expected Contribution to Science & Technology

The results lend strong credence to the intermediacy of Co(IV)–O species in cobalt-catalyzed oxidation of organic substrates, as well as in the catalytic oxidation of water that evolves molecular oxygen.

• Synthesis, structure, and reactivity studies of Co(IV)-oxo complex
• EPR spectroscopic analysis for characterization of Co(IV)-oxo species