Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Structure and Properties of a Nonheme Pentacoordinate Iron(II) Complex with a Macrocyclic Triazapyridinophane Ligand

  • You, Minyoung (Department of Chemistry, Division of Nano Sciences, Ewha Womans University) ;
  • Seo, Mi Sook (Department of Chemistry, Division of Nano Sciences, Ewha Womans University) ;
  • Kim, Kwan Mook (Department of Chemistry, Division of Nano Sciences, Ewha Womans University) ;
  • Nam, Wonwoo (Department of Chemistry, Division of Nano Sciences, Ewha Womans University) ;
  • Kim, Jinheung (Department of Chemistry, Division of Nano Sciences, Ewha Womans University)
  • Published : 2006.08.20
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Abstract

A macrocyclic ligand, N,N',N'-tribenzyl-2,11,20-triaza[3,3,3](2,6)pyridinophane (BAPP), was used to prepare an iron(II) complex as a nonheme model complex, $[(BAPP)Fe]^{+2}$ (1). X-ray crystallography of a colorless crystal of 1 revealed that BAPP acted as a pentadentate ligand due to geometrical strain for the formation of a six-coordinate iron(II) complex by BAPP. As a result, the iron center revealed a significantly distorted square pyramidal geometry similar to that found in the active site of taurine dioxygenase (tauD). In the reaction of 1 with PhIO, no intermediate was observed in the UV-visible region of spectrometer at low temperatures. Catalytic oxidations of triphenyl phosphine with PhIO at ${-40^{\circ}C}$ revealed that 1 was able to convert triphenyl phosphine to triphenyl phosphine oxide.23; SSOCHKThioanisole was also oxidized to the corresponding methylphenyl sulfoxide under the same conditions.

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References

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