Potassium tetraiodoplatinate

{{Chembox

| ImageFile = K2PtI4.svg

| ImageSize = 210px

| ImageAlt =

| IUPACName =

| OtherNames =

|Section1={{Chembox Identifiers

| CASNo = 14708-56-6

| CASNo_Comment = anhydrous

| index1_label = dihydrate

| CASNo1 =

| CASNo1_Comment =

| PubChem = 12864171

| StdInChI=1S/4HI.2K.Pt/h4*1H;;;/q;;;;2*+1;+2/p-4

| StdInChIKey = WYVJXXSNNPZRSS-UHFFFAOYSA-J

| InChI1=1S/4I.2K.2H2O.Pt/h;;;;;;2*1H2;/q4*-1;2*+1;;;+2

| InChIKey1=FVUALNGXMHIQHF-UHFFFAOYSA-N

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

| SMILES1 = [K+].[K+].[I-][Pt+2]([I-])([I-])[I-].O.O

}}

|Section2={{Chembox Properties

| Pt = 1|I = 4|K = 2|O = 2|H=4

| MolarMass =

| Appearance = black solid

| Density = 4.31 g/cm³{{cite journal |doi=10.3891/acta.chem.scand.43-0811 |title=The Crystal Structure of Potassium Tetraiodoplatinate(II) Dihydrate |date=1989 |last1=Olsson |first1=Lars-Fride |last2=Oskarsson |first2=Åke |last3=Larsen |first3=Sine |last4=Teuber |first4=Lene |last5=Lucanska |first5=Brigitta |last6=Krätsmar-Smogrovic |first6=Juraj |last7=Valent |first7=Aladár |last8=Alminger |first8=Tomas |last9=Erickson |first9=Magnus |last10=Grundevik |first10=Inger |last11=Hagin |first11=Inger |last12=Hoffman |first12=Kurt-Jürgen |last13=Johansson |first13=Svante |last14=Larsson |first14=Sam |last15=Löfberg |first15=Ingalil |last16=Ohlson |first16=Kristina |last17=Persson |first17=Björn |last18=Skånberg |first18=Inger |last19=Tekenbergs-Hjelte |first19=Lija |journal=Acta Chemica Scandinavica |volume=43 |pages=811–812 }}

| MeltingPt =

| MeltingPt_notes =

| BoilingPt =

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| Solubility = }}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt = }}

|Section4={{Chembox Related

|OtherAnions=Potassium tetrachloroplatinate

}}

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Potassium tetraiodoplatinate is the inorganic compound with the formula {{chem2|K2PtI4*(H2O)2}}. It is the potassium salt of tetraiodoplatinate, a square planar complex of platinum(II). The compound crystallizes from water as the dihydrate, whereas the related chloride and bromide {{chem2|K2PtCl4}} and {{chem2|K2PtBr4}} are obtained only as the anhydrous salts.

It reacts with amines and with ammonia to give charge-neutral derivatives {{chem2|PtI2(RNH2)2}}.{{cite journal |doi=10.1016/j.ica.2003.10.039 |title=Multinuclear NMR Study and Crystal Structures of Complexes of the Types cis- and trans-Pt(amine)₂I₂ |date=2004 |last1=Rochon |first1=Fernande D. |last2=Buculei |first2=Viorel |journal=Inorganica Chimica Acta |volume=357 |issue=8 |pages=2218–2230 }} The compound is prepared by the salt metathesis reaction of potassium iodide and potassium tetrachloroplatinate:{{cite book |doi=10.1002/9780470132562.ch21 |chapter=Dipotassium Tetraiodoplatinate(II) Dihydrate |date=1989 |last1=Olsson |first1=Lars-Fride |title=Inorganic Syntheses |volume=25 |pages=98–100 |isbn=978-0-471-61874-4 }}

:{{chem2|K2PtCl4 + 4 KI -> K2PtI4 + 4 KCl}}

Potassium tetraiodoplatinate is a precursor to the anticancer drug cisplatin.