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Chromium(v)-oxo and chromium(iii)-superoxo complexes bearing a macrocyclic TMC ligand in hydrogen atom abstraction reactions
- Title
- Chromium(v)-oxo and chromium(iii)-superoxo complexes bearing a macrocyclic TMC ligand in hydrogen atom abstraction reactions
- Authors
- Cho J.; Woo J.; Eun Han J.; Kubo M.; Ogura T.; Nam W.
- Ewha Authors
- 남원우; 조재흥
- SCOPUS Author ID
- 남원우; 조재흥
- Issue Date
- 2011
- Journal Title
- Chemical Science
- ISSN
- 2041-6520
- Citation
- Chemical Science vol. 2, no. 10, pp. 2057 - 2062
- Indexed
- SCI; SCIE; SCOPUS
- Document Type
- Article
- Abstract
- A Cr(v)-oxo complex bearing a macrocyclic TMC ligand, [Cr V(TMC)(O)(OCH 3)] 2+, was synthesized, isolated, and characterized by various physicochemical methods, including UV-vis, ESI-MS, resonance Raman, EPR and X-ray analysis. The reactivity of the Cr(v)-oxo complex was investigated in C-H and O-H bond activation reactions. The reactivity of a Cr(iii)-superoxo complex, [Cr III(TMC)(O 2)(Cl)] +, was investigated in O-H bond activation reactions as well. By comparing reactivities of the Cr(iii)-superoxo and Cr(v)-oxo complexes under the identical reaction conditions, we were able to demonstrate that the Cr(iii)-superoxo complex is more reactive than the Cr(v)-oxo complex in the activation of C-H and O-H bonds. The present results provide strong evidence that under certain circumstances, metal-superoxo species can be an alternative oxidant for high-valent metal-oxo complexes in oxygenation reactions. © The Royal Society of Chemistry 2011.
- DOI
- 10.1039/c1sc00386k
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
- Files in This Item:
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