Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and Reactivity of a Mononuclear Manganese(II) Complex Having Pseudo-Seven Coordination Environment

  • Yoon, Jee-Hee (Department of Chemistry and Nano Science, Center for Biomimetic Systems, Ewha Womans University) ;
  • Seo, Mi-Sook (Department of Chemistry and Nano Science, Center for Biomimetic Systems, Ewha Womans University) ;
  • Kim, Young-Mee (Department of Chemistry and Nano Science, Center for Biomimetic Systems, Ewha Womans University) ;
  • Kim, Sung-Jin (Department of Chemistry and Nano Science, Center for Biomimetic Systems, Ewha Womans University) ;
  • Yoon, Sung-Ho (Department of Bio & Nano Chemistry, Kookmin University) ;
  • Jang, Ho G. (Department of Chemistry and Center for Electro & Photo Responsive Molecules, Korea University) ;
  • Nam, Won-Woo (Department of Chemistry and Nano Science, Center for Biomimetic Systems, Ewha Womans University)
  • Published : 2009.03.20
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Abstract

Utilizing a planar five coordinating N3S2 ligand, 2,6-bis(2-methylthiophenyliminomethyl)pyridine, a pseudo 7-coordinated manganese(II) complex with two labile triflate anions in the axial positions was synthesized. The reaction of the manganese(II) complex with an oxidant, iodosylbenzene, produced a metastable high-valent manganese(IV)-oxo species at 0 ${^{\circ}C}$. The high-valent Mn(IV)-oxo intermediate was characterized with a UV-vis spectrophotometer and an electrospray ionization mass spectroscopy. Reactivity studies of the Mn(IV)=O species revealed that the intermediate is capable of oxygenating $PPh_3$ and N-dealkylating N,N-dimethyl-toludine.

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