Iron(II) acetate

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Iron(II) acetate
Skeletal formula of iron(II) acetate
Names
IUPAC name
Iron(II) acetate
Other names
Ferrous acetate
Identifiers
3D model (Jmol)
ChemSpider
ECHA InfoCard 100.019.492
RTECS number AI3850000
Properties
C4H6FeO4
Molar mass 173.93 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)[1]
Pbcn, No. 60 (200 K)[1]
2/m 2/m 2/m (200 K)[1]
a = 18.1715(4) Å, b = 22.1453(5) Å, c = 8.2781(2) Å (200 K)[1]
α = 90°, β = 90°, γ = 90°
Hazards
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)[3]
GHS signal word Warning
H315, H319, H335[3]
P261, P305+351+338[3]
Irritant Xi
R-phrases R36/37/38
S-phrases S26, S36
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
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 an coordination complex with formula Fe(C2H3O2)2. It is a white solid, although impure samples can be slightly colored. A light green tetrahydrate is also known, which is highly soluble in water.

Preparation and structure[edit]

Iron powder reacts with hot acetic acid to give the product:[1]

Fe + 2 CH3CO2H → Fe(CH3CO2)2 + H2

It adopts a polymeric structure with octahedral Fe(II) centers bridged by acetate ligands. It is not a salt.[1]

The hydrate can 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[edit]

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

References[edit]

  1. ^ a b c d e f g 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. Retrieved 2014-08-02. 
  2. ^ a b 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. ^ a b c d Sigma-Aldrich Co., Iron(II) acetate. Retrieved on 2014-05-03.
  4. ^ "MSDS of Ferrous acetate". https://www.fishersci.ca. Fair Lawn, New Jersey: Fisher Scientific, Inc. Retrieved 2014-08-02.  External link in |website= (help)
  5. ^ Synthesis of Iron(II) acetate hydrate (ferrous acetate)
  6. ^ Wildermuth, Egon; Stark, Hans; Friedrich, Gabriele; Ebenhöch, Franz Ludwig; Kühborth, Brigitte; Silver, Jack; Rituper, Rafael (2005), "Iron Compounds", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, doi:10.1002/14356007.a14_591 
  7. ^ Ebonizing Wood with Ferric Acetate