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caesium oxalate

{{Distinguish|cerium oxalate}}

{{Chembox

| PIN = Dicaesium oxalate

| ImageFile = Cesium oxalate.svg

| ImageSize = 180px

| IUPACName = Caesium oxalate

|Section1={{Chembox Identifiers

| PubChem= 13628982

| ChemSpiderID = 10760846

| CASNo = 1068-63-9

| CASNo_Ref = {{cascite|correct|CAS}}

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

| UNII = KB9QB78M28

| EC_number = 213-950-8

| StdInChI=1S/C2H2O4.2Cs/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);;/q;2*+1/p-2

| StdInChIKey = HEQUOWMMDQTGCX-UHFFFAOYSA-L

| SMILES = C(=O)(C(=O)[O-])[O-].[Cs+].[Cs+]

}}

|Section2={{Chembox Properties

| Formula = {{chem2|Cs2C2O4}}

| C=2 | Cs=2 | O=4

| Appearance = White solid

| Solubility = 76 g/(100 ml) (25 °C){{cite book |author1=Atherton Seidell |author1-link=Atherton Seidell |title=Solubilities of Inorganic and Organic Substances |date=1911 |publisher=D. Van Nostrand Company |location=the New York Public Library |page=83 |url=https://books.google.com/books?id=hpQIAAAAIAAJ |language=en}}

}}

|Section7={{Chembox Hazards

| GHSPictograms = {{GHS07}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|302|312}}

| PPhrases = {{P-phrases|264|270|280|301+312|302+352|312|322|330|363|501}}

}}

}}

Caesium oxalate (standard IUPAC spelling), or dicesium oxalate, or cesium oxalate (American spelling) is a chemical compound with the chemical formula {{chem2|Cs2C2O4|auto=1}}. It is a caesium salt of oxalic acid. It consists of caesium cations {{chem2|Cs+}} and oxalate anions {{chem2|C2O4(2−)}}.

Preparation

Caesium oxalate can be prepared by passing carbon monoxide and carbon dioxide over caesium carbonate at 380 °C:{{cite journal |last1=Kudo |first1=Kiyoshi |last2=Ikoma |first2=Futoshi |last3=Mori |first3=Sadayuki |last4=Komatsu |first4=Koichi |last5=Sugita |first5=Nobuyuki |title=Synthesis of oxalate from carbon monoxide and carbon dioxide in the presence of caesium carbonate |journal=Journal of the Chemical Society, Perkin Transactions 2 |date=1997 |issue=4 |pages=679–682 |doi=10.1039/A607856G}}

:{{chem2|Cs2CO3 + CO → Cs2C2O4}}

Other alkali carbonates do not undergo transformation to oxalate.

Caesium carbonate can react with oxalic acid in aqueous solution to give caesium oxalate.{{Cite journal|last1=Dinnebier|first1=Robert E.|last2=Vensky|first2=Sascha|last3=Panthöfer|first3=Martin|last4=Jansen|first4=Martin|date=2003-03-01|title=Crystal and Molecular Structures of Alkali Oxalates: First Proof of a Staggered Oxalate Anion in the Solid State|url=https://doi.org/10.1021/ic0205536|journal=Inorganic Chemistry|volume=42|issue=5|pages=1499–1507|doi=10.1021/ic0205536|pmid=12611516|issn=0020-1669|url-access=subscription}}

:{{chem2|Cs2CO3 + H2C2O4*2H2O → Cs2C2O4*H2O + CO2 + 2 H2O}}

Chemical Reactions

Caesium oxalate can be reduced back into caesium carbonate and carbon monoxide by thermal decomposition.

:{{chem2|Cs2C2O4 → Cs2CO3 + CO}}

Double salts

Compounds that contain caesium and another element in addition to the oxalate anion are double salts of caesium and oxalate. The oxalate may form a complex with a metal that can make a salt with caesium.

Examples include:

class="wikitable"

!name

!formula

!properties

!reference

caesium bis(oxalato)oxotitanate(IV) trihydrate

|{{chem2|Cs4[TiO(C2O4)2]2*3H2O}}

|

|{{cite journal |last1=Fester |first1=A. |last2=Bensch |first2=W. |last3=Trömel |first3=M. |title=Crystal structure of cesium-bis(oxalato)oxo-titanate(IV) hydrate |journal=Inorganica Chimica Acta |date=March 1992 |volume=193 |issue=1 |pages=99–103 |doi=10.1016/S0020-1693(00)83801-3}}

caesium oxalatooxovanadate(IV)

|{{chem2|Cs2[VO(C2O4)2]}}

|

|{{cite journal |last1=Bhaumik |first1=B. B. |last2=Chattopadhyay |first2=R. K. |title=Oxalatooxovanadates (IV) |journal=Indian J. Chem. |date=April 1981 |volume=20A |pages=417–419 |url=http://nopr.niscair.res.in/bitstream/123456789/50080/1/IJCA_20A%284%29_417-419.pdf}}

caesium tris(oxalato) ferrate(III) dihydrate

|{{chem2|Cs3[Fe(C2O4)3]*2H2O}}

|

|{{cite journal |last1=Randhawa |first1=B. S. |title=Mössbauer study on thermal decomposition of cesium tris(oxalato) ferrate(III) dihydrate |journal=Journal of Radioanalytical and Nuclear Chemistry |date=September 1995 |volume=201 |issue=1 |pages=57–63 |doi=10.1007/bf02204772|s2cid=97013742}}

caesium bis(oxalato) cobaltate(II) tetrahydrate

|{{chem2|Cs2[Co(C2O4)2]*4H2O}}

|

|{{Cite journal|last1=Schwendtner|first1=Karolina|last2=Kolitsch|first2=Uwe|date=2004-05-15|title=Cs 2 Co II (C 2 O 4 ) 2 ·4H 2 O|url=http://scripts.iucr.org/cgi-bin/paper?S1600536804009626|journal=Acta Crystallographica Section E|volume=60|issue=5|pages=m659–m661|doi=10.1107/S1600536804009626|bibcode=2004AcCrE..60M.659S |issn=1600-5368|url-access=subscription}}

caesium bis(oxalato)nickelate(III) tetrahydrate

|{{chem2|Cs[Ni(C2O4)2]*4H2O}}

|

|{{Cite journal|last=Modebadze|first=M. E.|date=1987|title=Study of oxalate compounds of nickel|url=http://inis.iaea.org/Search/search.aspx?orig_q=RN:20028788|journal=Investigations in Chemistry of Complexes and Compounds of Certain Transition and Rare Metals. No. 4|language=Russian}}

caesium tris(oxalato)germanate(IV)

|{{chem2|Cs2[Ge(C2O4)3]}}

|

|{{cite journal |last1=Lopez |first1=Jordan R. |last2=Akutsu |first2=Hiroki |last3=Martin |first3=Lee |title=Radical-cation salt with novel BEDT-TTF packing motif containing tris(oxalato)germanate(IV) |journal=Synthetic Metals |date=November 2015 |volume=209 |pages=188–191 |doi=10.1016/j.synthmet.2015.07.019|url=http://irep.ntu.ac.uk/id/eprint/28068/1/PubSub5587_Martin.pdf}}

caesium yttrium(III) oxalate monohydrate

|{{chem2|CsY(C2O4)2*H2O}}

|monoclinic a = 8.979, b = 6.2299, c = 8.103 Å, β = 90.05° V = 453.3 Å3, space group P2/n

|{{Cite journal|last1=Bataille|first1=Thierry|last2=Auffrédic|first2=Jean-Paul|last3=Louër|first3=Daniel|date=2000|title=Crystal structure and thermal behaviour of the new layered oxalate Y(H2O)Cs(C2O4)2 studied by powder X-ray diffraction|url=http://xlink.rsc.org/?DOI=b001201g|journal=Journal of Materials Chemistry|volume=10|issue=7|pages=1707–1711|doi=10.1039/b001201g|url-access=subscription}}

caesium (diaquo)bis(oxalato)oxoniobate(V) dihydrate

|{{chem2|Cs[NbO(C2O4)2(H2O)2]*2H2O}}

|

|{{Cite journal|last1=Brničević|first1=N.|last2=Djordjević|first2=C.|date=February 1976|title=Co-ordination complexes of niobium and tantalum XVI. salts of oxy-bis-oxalato niobate (V)|url=https://linkinghub.elsevier.com/retrieve/pii/0022508876901958|journal=Journal of the Less Common Metals|language=en|volume=45|issue=1|pages=45–52|doi=10.1016/0022-5088(76)90195-8|url-access=subscription}}

|{{chem2|Cs2[NH4]2[Mo3O8(C2O4)3]}}

|

|{{Cite journal|last1=Goel|first1=S. P.|last2=Verma|first2=G. R.|last3=Kumar|first3=Sanjive|last4=Sharma|first4=M. P.|date=February 1991|title=Preparation of cesium trimolybdate by the thermal decomposition of a new oxomolybdenum(VI) oxalato complex|url=http://link.springer.com/10.1007/BF02055943|journal=Journal of Thermal Analysis|language=en|volume=37|issue=2|pages=427–432|doi=10.1007/BF02055943|s2cid=94623703|issn=0368-4466|url-access=subscription}}

tetracaesium dilanthanum(III) oxalate octahydrate

|{{chem2|Cs4La2(C2O4)5*8H2O}}

|

|{{Cite journal|last1=Genčova|first1=O.|last2=Šiftar|first2=J.|date=May 1995|title=Synthesis and thermal characteristics of caesium oxalato-metallates of some rare earths|url=http://link.springer.com/10.1007/BF02547547|journal=Journal of Thermal Analysis|language=en|volume=44|issue=5|pages=1171–1176|doi=10.1007/BF02547547|s2cid=94768537|issn=0368-4466|url-access=subscription}}

tetracaesium dipraseodymium(III) oxalate octahydrate

|{{chem2|Cs4Pr2(C2O4)5*8H2O}}

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caesium neodymium(III) oxalate hexahydrate

|{{chem2|CsNd(C2O4)2*6H2O}}

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caesium samarium(III) oxalate hexahydrate

|{{chem2|CsSm(C2O4)2*6H2O}}

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caesium dysprosium(III) oxalate hydrate

|{{chem2|CsDy(C2O4)2*?H2O}}

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caesium gadolinium(III) oxalate sesquihydrate

|{{chem2|CsGd(C2O4)2*1.5H2O}}

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caesium terbium(III) oxalate sesquihydrate

|{{chem2|CsTb(C2O4)2*1.5H2O}}

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caesium dysprosium(III) oxalate sesquihydrate

|{{chem2|CsDy(C2O4)2*1.5H2O}}

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caesium holmium(III) oxalate sesquihydrate

|{{chem2|CsHo(C2O4)2*1.5H2O}}

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caesium ytterbium(III) oxalate sesquihydrate

|{{chem2|CsYb(C2O4)2*1.5H2O}}

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caesium lutetium(III) oxalate sesquihydrate

|{{chem2|CsLu(C2O4)2*1.5H2O}}

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dicaesium dioxotungsten(VI) oxalate

|{{chem2|Cs2[WO2](C2O4)2}}

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dicaesium dioxotungsten(VI) difluoride monooxalate

|{{chem2|Cs2[WO2]F2(C2O4)}}

|

|{{cite journal |last1=Sengupta |first1=A. K. |last2=Bhaumik |first2=B. B. |last3=Nath |first3=S. K. |title=Oxalatofluorotungstates (VI) & Oxalatotungstates (VI) of Some Alkali Metals & Complex Cations |journal=Indian Journal of Chemistry |date=June 1983 |volume=22A |pages=535–536 |url=http://nopr.niscair.res.in/bitstream/123456789/49275/1/IJCA_22A%286%29_535-536.pdf}}

caesium tris(oxalato)rhenate(III)

|{{chem2|Cs3[Re(C2O4)3]}}

|

|{{Cite journal|last1=Hadadzadeh|first1=Hassan|last2=Rezvani|first2=Ali Reza|last3=Salehi Rad|first3=Ali Reza|last4=Khozeymeh|first4=Elahe|date=August 2008|title=A Novel Method for Preparation of Alumina-Supported Rhenium-Cesium Catalyst, Re-Cs/g-Al2O3|url=https://doi.org/10.30492/ijcce.2008.6965|journal=Iranian Journal of Chemistry and Chemical Engineering |volume=27|issue=3|doi=10.30492/ijcce.2008.6965}}

dicaesium uranyl monooxalate monosulfate dihydrate

|{{chem2|Cs2[UO2](C2O4)(SO4)*2H2O}}

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ammonium caesium uranyl monooxalate monosulfate dihydrate

|{{chem2|[NH4]Cs[UO2](C2O4)(SO4)*2H2O}}

|

|{{cite journal |last1=Chernyaev |first1=I. I. |last2=Golovnya |first2=V. A. |last3=Shchelokov |first3=R. N. |title=Aquo-Oxalato-Sulfate Compounds of Uranium |trans-title=Aquo-Oxalato-Sulfate Compounds of Uranium |journal=Zhur. Neorg. Khim. |date=1960-07-01 |volume=5 |osti=4166316 |url=https://www.osti.gov/biblio/4166316 |language=Russian}}

caesium dioxoneptunium(VI) oxalate hydrate

|{{chem2|Cs[NpO2]C2O4*nH2O}}

|

|{{cite journal |last1=Charushnikova |first1=I. A. |last2=Krot |first2=N. N. |last3=Polyakova |first3=I. N. |title=Synthesis and crystal structure of double Np(V) cesium oxalate CsNpO2C2O4 · nH2O |journal=Radiochemistry |date=May 2006 |volume=48 |issue=3 |pages=223–226 |doi=10.1134/S1066362206030039|s2cid=92883386}}

Mixed anion compounds containing caesium, oxalate and another anion also exist, such as the uranyl sulfate above, and caesium bis(oxalato)borate (CsBOB) ({{chem2|Cs[B(C2O4)2]}}).{{cite journal |last1=Kazdobin |first1=K. A. |last2=Diamant |first2=V. A. |last3=Trachevskii |first3=V. V. |title=MICROWAVE – ASSISTED SYNTHESIS OF BIS (OXALATO) ALKALI METAL BORATES |url=https://www.researchgate.net/publication/279929586}}

References

{{Reflist}}

{{Caesium compounds}}

{{Oxalates}}

Category:Caesium compounds

Category:Oxalates