Iron(II) oxalate

Iron(II) oxalate
Names
IUPAC name
Iron(II) oxalate
Other names
Iron oxalate
Ferrous oxalate
Identifiers
3D model (JSmol)
ECHA InfoCard 100.007.472
EC Number 208-217-4
Properties
FeC2O4 (anhydrous)
FeC2O4·2 H2O (dihydrate)
Molar mass 143.86 g/mol (anhydrous)
179.89 g/mol (dihydrate)
Appearance yellow powder
Odor odorless
Density 2.28 g/cm3
Melting point 190 °C (374 °F; 463 K)
(anhydrous)[1]
150–160 °C (302–320 °F; 423–433 K)
(dihydrate) decomposes
Boiling point 365.1 °C (689.2 °F; 638.2 K)
(anhydrous)[1]
dihydrate:
0.097 g/100ml (25 °C)[2]
Hazards
GHS pictograms [3]
GHS signal word Warning
H302, H312[3]
P280[3]
Flash point 188.8 °C (371.8 °F; 461.9 K)
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

Ferrous oxalate, or iron(II) oxalate, is a inorganic compound with the formula FeC2O4(H2O)x where x is typically 2. These are orange compounds, poorly soluble in water.

Structure

The dihydrate FeC2O4(H2O)2 is a coordination polymer, consisting of chains of oxalate-bridged ferrous centers, each with two aquo ligands.[4]

When heated, it dehydrates and decomposes into a mixture of iron oxides and pyrophoric iron metal, with release of carbon dioxide, carbon monoxide, and water.[5]

See also

A number of other iron oxalates are known

References

  1. 1 2 http://www.guidechem.com/cas-516/516-03-0.html
  2. ↑ http://chemister.ru/Database/properties-en.php?dbid=1&id=2084
  3. 1 2 3 Sigma-Aldrich Co., Iron(II) oxalate dihydrate. Retrieved on 2014-05-03.
  4. ↑ Echigo, Takuya; Kimata, Mitsuyoshi (2008). "Single-crystal X-ray diffraction and spectroscopic studies on humboldtine and lindbergite: weak Jahn–Teller effect of Fe2+ ion". Phys. Chem. Minerals. 35: 467–475. doi:10.1007/s00269-008-0241-7.
  5. ↑ Hermanek, Martin; Zboril, Radek; Mashlan, Miroslav; et al. (2006). "Thermal behaviour of iron(II) oxalate dihydrate in the atmosphere of its conversion gases". J. Mater. Chem. 16: 1273–1280.
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