Potassium hexachloroplatinate: Difference between revisions

|Watchedfields = changed

|verifiedrevid = 439227567

|Name =Potassium hexachloroplatinate

|ImageFile =K2PtCl6.svg

|ImageFile2 =Potassium hexachloroplatinate(IV).jpg

|CASNo_Ref = {{cascite|correct|??}}

|CASNo =16921-30-5

| EC_number = 240-979-3

|UNII_Ref = {{fdacite|correct|FDA}}

|UNII = 99U3Q94QT1

|PubChem =61856

|RTECS = TP1650000

|SMILES =Cl[Pt-2](Cl)(Cl)(Cl)(Cl)Cl.[K+].[K+]

}}

|Formula = K₂PtCl₆

|MolarMass = 485.99 g/mol

|Appearance =orange to yellow solid

|Density = 3.344 g/cm³

|MeltingPtC = 250

|MeltingPt_notes = (decomposes)

|Solubility = 0.89 g/100ml (at 25 °C) <ref name=Grinberg>{{cite journal |author1=Grinberg, A. A. |author2=Sibirskaya, V. V. | title = Solubility of hexammine and hexahalo platinum(IV) complexes | journal = Zhurnal Neorganicheskoi Khimii | year = 1967 | volume = 12 | pages = 2069–2071}}</ref>

| SolubilityProduct = 7.48{{e|&minus;6}}<ref name="crc">{{cite book |author1=John Rumble |title=CRC Handbook of Chemistry and Physics |date=June 18, 2018 |publisher=CRC Press |isbn=978-1-138-56163-2 |pages=5–189|edition=99 |language=English}}</ref>

}}

| GHS_ref=<ref>{{cite web |title=Potassium hexachloroplatinate(IV) |url=https://pubchem.ncbi.nlm.nih.gov/compound/61856#section=Safety-and-Hazards |website=pubchem.ncbi.nlm.nih.gov |access-date=27 December 2021 |language=en}}</ref>

| GHSPictograms = {{GHS05}}{{GHS06}}{{GHS07}}{{GHS08}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|301|317|318|334}}

| PPhrases = {{P-phrases|261|264|270|272|280|285|301+310|302+352|304+341|305+351+338|310|321|330|333+313|342+311|363|405|501}}

|ExternalSDS = [http://msds.chem.ox.ac.uk/PO/potassium_hexachloroplatinate_IV.html Oxford MSDS]

|FlashPtC = 250

}}

|Section4={{Chembox Related

| OtherAnions = [[Potassium tetrachloroplatinate]]}}

'''Potassium hexachloroplatinate''' is the [[inorganic compound]] with the formula K₂PtCl₆. It is a yellow solid that is an example of a comparatively insoluble potassium salt. The salt features the [[hexachloroplatinate]](IV) dianion, which has [[octahedral coordination geometry]].

The precipitation of this compound from solutions of [[hexachloroplatinic acid]] was formerly used for the determination of potassium by [[gravimetric analysis]].<ref>{{cite journal |author1=G. F. Smith |author2=J. L. Gring | title = The Separation and Determination of the Alkali Metals Using Perchloric Acid. V. Perchloric Acid and Chloroplatinic Acid in the Determination of Small Amounts of Potassium in the Presence of Large Amounts of Sodium | journal = [[J. Am. Chem. Soc.]] | year = 1933 | volume = 55 | issue = 10 | pages = 3957–3961 | doi = 10.1021/ja01337a007}}</ref> It is also useful as an intermediate in the recovery of platinum from wastes.<ref>George B. Kauffman, Larry A. Teter "Recovery of Platinum from Laboratory Residues" Inorganic Syntheses, 1963, volume 7, pp. 232-236. {{doi|10.1002/9780470132388.ch61}}</ref>

==Reactions==

Using [[salt metathesis]] reactions, potassium hexachloroplatinate is converted to a variety of quaternary ammonium and related lipophilic salts. These include [[tetrabutylammonium]] salt (NBu₄)₂PtCl₆, which has been investigated as a [[catalyst]].<ref>{{cite journal|author1=Iovel, I. G. |author2=Goldberg, Y. S. |author3=Shymanska, M. V. |author4=Lukevics, E. |title=Quaternary Onium Hexachloroplatinates: Novel Hydrosilylation Catalysts|journal=Organometallics|year=1987|volume=6|issue=7|pages=1410–1413|doi=10.1021/om00150a007}}</ref>

Reduction of potassium hexachloroplatinate with [[hydrazine]] [[hydrogen chloride|dihydrochloride]] gives the [[potassium tetrachloroplatinate|corresponding tetrachloroplatinate salt]].<ref>{{cite book|author=George B. Kauffman |author2=Dwaine A. Cowan |title=cis- and trans-Dichlorodiammine Platinum(II)|chapter=Cis - and trans -Dichlorodiammineplatinum(II)|series=Inorganic Syntheses|year=1963|volume=7|pages=239–245|doi=10.1002/9780470132388.ch63|isbn=978-0-470-13238-8}}</ref><ref>{{cite journal |author1=Keller, R. N. |author2=Moeller, T. | title = Potassium Tetrachloroplatinate(II) | journal = [[Inorg. Synth.]] | year = 1963 | volume = 7 | pages = 247–250 | doi = 10.1002/9780470132333.ch79}}</ref>

Potassium hexachloroplatinate reacts with aqueous ammonia to give [[chloropentammineplatinum chloride]]:<ref>{{cite journal |doi=10.1002/9780470132555.ch74 |title=Pentaammineplatinum(IV) Complexes |journal=Inorganic Syntheses | last1=Curtis |first1=Neville J. |last2=Lawrance |first2=Geoffrey A. |last3=Sargeson |first3=Alan M. |year=1986 |volume=24 |pages=277–279 }}</ref>

:{{chem2| K2PtCl6 + 5 NH3 -> [PtCl(NH3)5]Cl3 + 2 KCl}}

==Safety==

Dust containing potassium hexachloroplatinate can be highly allergenic. "Symptoms range from irritation of skin and mucous membranes to life-threatening attacks of asthma."<ref>{{cite book |doi=10.1002/14356007.a21_075|chapter=Platinum Group Metals and Compounds |title=Ullmann's Encyclopedia of Industrial Chemistry |year=2001 |last1=Renner |first1=Hermann |last2=Schlamp |first2=Günther |last3=Kleinwächter |first3=Ingo |last4=Drost |first4=Ernst |last5=Lüschow |first5=Hans Martin |last6=Tews |first6=Peter |last7=Panster |first7=Peter |last8=Diehl |first8=Manfred |last9=Lang |first9=Jutta |last10=Kreuzer |first10=Thomas |last11=Knödler |first11=Alfons |last12=Starz |first12=Karl Anton |last13=Dermann |first13=Klaus |last14=Rothaut |first14=Josef |last15=Drieselmann |first15=Ralf |last16=Peter |first16=Catrin |last17=Schiele |first17=Rainer |isbn=3-527-30673-0 }}</ref>

==Related compounds==

*[[Ammonium hexachloroplatinate]]

{{Platinum compounds}}

{{Chlorine compounds}}

[[Category:Hexachloroplatinates]]