Iron(II) acetate
Skeletal formula of iron(II) acetate
Names
IUPAC name
Iron(II) acetate
Other names
Ferrous acetate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.019.492
RTECS number
  • AI3850000
UNII
  • InChI=1S/2C2H4O2.Fe/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 checkY
    Key: LNOZJRCUHSPCDZ-UHFFFAOYSA-L checkY
  • InChI=1/2C2H4O2.Fe/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
    Key: LNOZJRCUHSPCDZ-NUQVWONBAS
  • coordination form: CC(O1)O[Fe]12OC(O2)C
  • ionic form: CC(=O)[O-].[Fe+2].CC(=O)[O-]
Properties
C4H6FeO4
Molar mass 173.933 g·mol−1
Appearance White crystals (anhydrous)
Light green crystals (tetrahydrate)
Odor Odorless
Density 1.734 g/cm3 (−73 °C)[1]
Melting point 190–200 °C (374–392 °F; 463–473 K)
decomposes[2][3]
Soluble[2]
Structure
Orthorhombic, oP75 (200 K)
Pbcn, No. 60 (200 K)[1]
2/m 2/m 2/m (200 K)
a = 18.1715(4) Å, b = 22.1453(5) Å, c = 8.2781(2) Å (200 K)
α = 90°, β = 90°, γ = 90°
Hazards
GHS labelling:
GHS07: Exclamation mark[3]
Warning
H315, H319, H335[3]
P261, P305+P351+P338[3]
NFPA 704 (fire diamond)
[4]
NFPA 704 four-colored diamond
2
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Iron(II) acetate is a coordination complex with formula Fe(CH3COO)2. It is a white solid, although impure samples can be slightly colored.[1] A light green tetrahydrate is also known, which is highly soluble in water.

Preparation and structure

Although ferrous acetate can be viewed as a simple salt, X-ray crystallography reveals a complicated polymeric structure.[1]

Iron powder reacts with acetic acid in electrolysis to give the ferrous acetate, with evolution of hydrogen gas:[1]

Fe + 2 CH3CO2H → Fe(CH3CO2)2 + H2

It can also be made from the insoluble, olive green, Iron(II) carbonate.

It adopts a polymeric structure with octahedral Fe(II) centers interconnected by acetate ligands. It is a coordination polymer.[1]

A hydrated form be made by the reaction of ferrous oxide or ferrous hydroxide with acetic acid.[5]

Reaction of scrap iron with acetic acid affords a brown mixture of various iron(II) and iron(III) acetates that are used in dyeing.[6]

Uses

Ferrous acetate is used as a mordant by the dye industry. Ebonizing wood is one such process.[7]

References

  1. 1 2 3 4 5 6 Weber, Birgit; Betz, Richard; Bauer, Wolfgang; Schlamp, Stephan (2011). "Crystal Structure of Iron(II) Acetate". Zeitschrift für anorganische und allgemeine Chemie. 637: 102–107. doi:10.1002/zaac.201000274.
  2. 1 2 Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
  3. 1 2 3 4 Sigma-Aldrich Co., Iron(II) acetate. Retrieved on 2014-05-03.
  4. ↑ "MSDS of Ferrous acetate". fishersci.ca. Fair Lawn: Fisher Scientific. Retrieved 2014-08-02.
  5. ↑ "Synthesis of Iron(II) acetate hydrate (ferrous acetate)". Archived from the original on 2013-08-25. Retrieved 2009-01-07.
  6. ↑ Wildermuth, Egon; Stark, Hans; Friedrich, Gabriele; Ebenhöch, Franz Ludwig; Kühborth, Brigitte; Silver, Jack; Rituper, Rafael (2000). "Iron Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a14_591. ISBN 978-3527306732.
  7. ↑ Ebonizing Wood with Ferric Acetate
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