tetrachloroferrate

{{Chembox

|ImageFile = Tetrachloroferrate.svg

|Section1={{Chembox Identifiers

| QID = Q27113992

| ChEBI = 30811

| ChemSpiderID = 25557

| Gmelin = 26231

| PubChem = 27463

| StdInChI=1S/4ClH.Fe/h4*1H;/q;;;;+3/p-4

| StdInChIKey = HCQLFHJKDCJBSQ-UHFFFAOYSA-J

| SMILES = Cl[Fe-](Cl)(Cl)Cl

}}

|Section2={{Chembox Properties

| Fe=1|Cl=4|Formula_Charge = −1

}}

|Section8={{Chembox Related

}}

}}

Tetrachloroferrate is the polyatomic ion having chemical formula {{chem2|FeCl4–}}. The metallate can be formed when ferric chloride ({{chem2|FeCl3}}) abstracts a chloride ion from various other chloride salts.{{cite journal |title= The Reaction of Ferric Chloride with Sodium and Potassium Chlorides |first1= Charles M. Jr. |last1= Cook |first2= Wendell E. Jr. |last2= Dunn |journal= J. Phys. Chem. |year= 1961 |volume= 65 |issue= 9 |pages= 1505–1511 |doi= 10.1021/j100905a008 }} The resulting tetrachloroferrate salts are typically soluble in non-polar solvents. The tetrachloroferrate anion, with iron(III) in the center, has tetrahedral geometry.{{cite journal |doi=10.1107/S2053229614007955|title=Phase Transitions and Twinned Low-Temperature Structures of Tetraethylammonium Tetrachloridoferrate(III) |year= 2014 |last1= Lutz |first1= Martin |last2= Huang| first2= Yuxing |last3= Moret |first3= Marc-Etienne |last4= Klein Gebbink |first4= Robertus J. M. |journal= Acta Crystallographica Section C|volume= 70|issue= 5 |pages= 470–476 |pmid= 24816016 |hdl= 1874/307900 |hdl-access=free }} It is useful as a non-coordinating anion comparable to perchlorate.{{cite journal |title= Oxidation of dithiocarbamato metal complexes |first1= Raymund M. |last1= Golding |first2= CM |last2= Harris |first3= KJ |last3= Jessop |first4= William C. |last4= Tennant |journal= Australian Journal of Chemistry |volume= 25 |issue= 12 |pages= 2567–2576 |year= 1972 |doi= 10.1071/CH9722567 }} 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.{{cite journal|title=A new class of magnetic fluids: bmim[FeCl₄] and nbmim[FeCl₄] ionic liquids |first1= Satoshi |last1= Hayashi |first2= Satyen |last2= Saha |first3= Hiro-o |last3= Hamaguchi |journal= IEEE Transactions on Magnetics |volume= 42 |year= 2006 |issue= 1 |pages= 12–14 |doi= 10.1109/TMAG.2005.854875 |bibcode= 2006ITM....42...12H |s2cid= 42347833 }} Trimethylchloromethylammonium tetrachloroferrate is a plastic crystal that can behave as a molecular switch in response to several different types of inputs.{{cite journal |title= Coexistence of Magnetic-Optic-Electric Triple Switching and Thermal Energy Storage in a Multifunctional Plastic Crystal of Trimethylchloromethyl Ammonium Tetrachloroferrate(III) |first1= Dong |last1= Li |first2= Xue-Mei |last2= Zhao |first3= Hai-Xia |last3= Zhao |first4= La-Sheng |last4= Long |first5= Lan-Sun |last5= Zheng |journal= Inorg. Chem. |year= 2019 |volume= 58 |issue= 1 |pages= 655–662 |doi= 10.1021/acs.inorgchem.8b02835 |pmid= 30576116 |s2cid= 58631842 }}