Tetrachloroferrate Explained

Tetrachloroferrate is the polyatomic ion having chemical formula . The metallate can be formed when ferric chloride 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]

References

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