Iron(III) acetate

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Iron (III) acetate, commonly known as basic iron acetate, is a chemical compound with the formula [Fe3O(OAc)6(H2O)3]OAc (OAc is CH3CO2-). It is a salt, with one ionic acetate anion and the triangular cation [Fe3O(OAc)6(H2O)3]+.[1]. Each metal in the cation is bonded to six oxygen atoms, including a triply bridging oxide at the center of the equilateral triangle. The water ligands can be replaced with other Lewis bases, such as pyridine.

The cation in basic iron acetate.
The cation in basic iron acetate.

Reduction of this species affords the mixed-valence derivative that contains one ferrous center in addition to two ferric centers.

In general acetate stabilizes multimetallic structures. Other examples include chromium(II) acetate, copper(II) acetate, and basic beryllium acetate.[2]

[edit] Other basic acetates

Other metals give analogous structures: chromium, ruthenium, vanadium, and rhodium. Additionally, mixed metal species are known such as the charge-neutral [Fe2CoO(OAc)6(H2O)3].[3]

[edit] Footnotes

  1. ^ Figgis, B. N.; Robertson, G. B. “Crystal-Molecular Structure and Magnetic Properties of Cr3(CH3.COO)6OCl.5H2O” Nature 1965, volume 205, pages 694-5. doi:10.1038/205694a0
  2. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
  3. ^ Blake, A. B. Yavari, A.; Hatfield, W. E.; Sethulekshmi, C. N. “Magnetic and Spectroscopic Properties of Some Heterotrinuclear Basic Acetates of Chromium(III), Iron(III), and Divalent Metal Ions” Journal of the Chemical Society, Dalton Transactions, 1985, pages 2509 - 2520. doi:10.1039/DT9850002509.


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