Diiron(II) μ-aqua-μ-hydroxo model for non-heme iron sites in proteins

Ivan V. Korendovych, Sergey V. Kryatov, William M. Reiff, Elena V. Rybak-Akimova

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

We have synthesized a diiron(II) complex with a novel aquahydroxo bridging motif, [Fe2(μ-H2O)(μ-OH)(TPA)2](OTf) 3 (1). This is a new member of the diiron diamond core family. The complex is stable in solution in nonpolar solvents as well as in the solid state. Two high-spin iron(II) sites are antiferromagnetically coupled (J = -9.6 cm-1). The drastic difference of ca. 1 V in the redox potential between complex 1 and its bis(hydroxo)-bridged analogue Fe2(OH) 2(TPA)3+ is accompanied by only a moderate difference in the dioxygen reactivity. This observation is consistent with the inner-sphere mechanism of iron(II)-dioxygen association rather than the outer-sphere electron transfer.

Original languageEnglish (US)
Pages (from-to)8656-8658
Number of pages3
JournalInorganic Chemistry
Volume44
Issue number24
DOIs
StatePublished - Nov 28 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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