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A cobalt(II) iminoiodane complex and its scandium adduct: mechanistic promiscuity in hydrogen atom abstraction reactions
- Title
- A cobalt(II) iminoiodane complex and its scandium adduct: mechanistic promiscuity in hydrogen atom abstraction reactions
- Authors
- Kundu, Subrata; Chernev, Petko; Engelmann, Xenia; Chung, Chan Siu; Dau, Holger; Bill, Eckhard; England, Jason; Nam, Wonwoo; Ray, Kallol
- Ewha Authors
- 남원우
- SCOPUS Author ID
- 남원우
- Issue Date
- 2016
- Journal Title
- DALTON TRANSACTIONS
- ISSN
- 1477-9226
1477-9234
- Citation
- DALTON TRANSACTIONS vol. 45, no. 37, pp. 14538 - 14543
- Publisher
- ROYAL SOC CHEMISTRY
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- In addition to oxometal [Mn+=O] and imidometal [Mn+=NR] units, transient metal-iodosylarene [M(n- 2)+-O=IPh] and metal-iminoiodane [M(n- 2)+-N(R)=IPh] adducts are often invoked as a possible "second oxidant" responsible for the oxo and imido group transfer reactivity. Although a few metal-iodosylarene adducts have been recently isolated and/or spectroscopically characterized, metal-iminoiodane adducts have remained elusive. Herein, we provide UV-Vis, EPR, NMR, XAS and DFT evidence supporting the formation of a metal-iminoiodane complex 2 and its scandium adduct 2-Sc. 2 and 2-Sc are reactive toward substrates in the hydrogen-atom and nitrene transfer reactions, which confirm their potential as active oxidants in metal-catalyzed oxidative transformations. Oxidation of para-substituted 2,6-di-tert-butylphenols by 2 and 2-Sc can occur by both coupled and uncoupled proton and electron transfer mechanisms; the exact mechanism depends on the nature of the para substituent.
- DOI
- 10.1039/c6dt01815g
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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