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

被引：18
|
作者：
Korendovych, IV
Kryatov, SV
Reiff, WM
Rybak-Akimova, EV
机构：
[1] Northeastern Univ, Dept Chem & Biol Chem, Boston, MA 02115 USA
[2] Tufts Univ, Dept Chem, Medford, MA 02115 USA
来源：
INORGANIC CHEMISTRY | 2005年 / 44卷 / 24期
关键词：
D O I：
10.1021/ic051739i
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We have synthesized a diiron(II) complex with a novel aqua-hydroxo bridging motif, [Fe-2(u-H2O)(u-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 Fe-2(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.
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收藏
页码：8656 / 8658
页数：3
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