Syntheses and structural study of trinuclear iron acetates [Fe3O(CH3COO)6(H2O)3]Cl· 6H2O and [Fe3O(CH3COO)6(H2O)3] [FeCl4]· 2CH3COOH

被引：0
|
作者：
S. G. Shova
I. G. Cadelnic
M. Gdaniec
Yu. A. Simonov
T. C. Jovmir
V. M. Meriacre
G. Filoti
C. I. Turta
机构：
[1] Academy of Sciences,Institute of Applied Physics
[2] Academy of Sciences,Institute of Chemistry
[3] A. Mickiewicz University,undefined
[4] National Institute of Material Physics,undefined
来源：
Journal of Structural Chemistry | 1998年 / 39卷
关键词：
Magnetic Susceptibility; Complex Cation; Effective Magnetic Moment; M6ssbauer Spectrum; Antiferromagnetic Exchange Interaction;
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摘要：
The structure of two trinuclear iron acetates [Fe3O(CH3COO)6(H2O)3]Cl· 6H2O (I) and [Fe3O(CH3COO)6(H2O)3][FeCl4] · 2CH3COOH (II) was determined by X-ray diffraction analysis. Crystals I and II are ionic and belong to the orthorhombic system with parameters a = 13.704(3), b = 23.332(5), c = 9.167(2) Å, R = 0.0355, space goup P21212 for I and a = 10.145(4), b = 15.323(6), c = 22.999(8) Å, R = 0.0752, space group Pbc21 for II. The complex cation [Fe3O(CH3COO)6(H2O)3]+ has a μ3-O-bridged structure typical for trinuclear iron (III) compounds. As shown by Mössbauer spectroscopy, the iron(III) ions are in the high-spin state. In trinuclear cations, antiferromagnetic exchange interaction takes place between the Fe(III) ions with the exchange parameter J = -26.69 cm−1 for II (Heisenberg-Dirac-Van Vleck model for D3h, symmetry).
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页码：747 / 761
页数：14
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