Tetrachloroferrate

Tetrachloroferrate is the polyatomic ion having chemical formula FeCl−4. The metallate can be formed when ferric chloride (FeCl3) abstracts a chloride ion from various other chloride salts.[1] The resulting tetrachloroferrate salts are typically soluble in non-polar solvents. The tetrachloroferrate anion, with iron(III) in the center, has tetrahedral geometry.[2] It is useful as a non-coordinating anion comparable to perchlorate.[3] Several organoammonium salts have been studied for their novel material properties. 1-Butyl-3-methylimidazolium tetrachloroferrate is one of several ionic liquids that are magnetic.[4] Trimethylchloromethylammonium tetrachloroferrate is a plastic crystal that can behave as a molecular switch in response to several different types of inputs.[5]

Tetrachloroferrate
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
26231
  • InChI=1S/4ClH.Fe/h4*1H;/q;;;;+3/p-4
    Key: HCQLFHJKDCJBSQ-UHFFFAOYSA-J
  • Cl[Fe-](Cl)(Cl)Cl
Properties
Cl4Fe−1
Molar mass 197.65 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

References
  1. Cook, Charles M. Jr.; Dunn, Wendell E. Jr. (1961). "The Reaction of Ferric Chloride with Sodium and Potassium Chlorides". J. Phys. Chem. 65 (9): 1505–1511. doi:10.1021/j100905a008.
  2. Lutz, Martin; Huang, Yuxing; Moret, Marc-Etienne; Klein Gebbink, Robertus J. M. (2014). "Phase Transitions and Twinned Low-Temperature Structures of Tetraethylammonium Tetrachloridoferrate(III)". Acta Crystallographica Section C. 70 (5): 470–476. doi:10.1107/S2053229614007955. hdl:1874/307900. PMID 24816016.
  3. Golding, Raymund M.; Harris, CM; Jessop, KJ; Tennant, William C. (1972). "Oxidation of dithiocarbamato metal complexes". Australian Journal of Chemistry. 25 (12): 2567–2576. doi:10.1071/CH9722567.
  4. Hayashi, Satoshi; Saha, Satyen; Hamaguchi, Hiro-o (2006). "A new class of magnetic fluids: bmim[FeCl4] and nbmim[FeCl4] ionic liquids". IEEE Transactions on Magnetics. 42 (1): 12–14. Bibcode:2006ITM....42...12H. doi:10.1109/TMAG.2005.854875. S2CID 42347833.
  5. Li, Dong; Zhao, Xue-Mei; Zhao, Hai-Xia; Long, La-Sheng; Zheng, Lan-Sun (2019). "Coexistence of Magnetic-Optic-Electric Triple Switching and Thermal Energy Storage in a Multifunctional Plastic Crystal of Trimethylchloromethyl Ammonium Tetrachloroferrate(III)". Inorg. Chem. 58 (1): 655–662. doi:10.1021/acs.inorgchem.8b02835. PMID 30576116. S2CID 58631842.


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