Caesium oxalate

Caesium oxalate
Identifiers
CAS Number	1068-63-9;
3D model (JSmol)	Interactive image;
ChemSpider	10760846;
EC Number	213-950-8;
PubChem CID	13628982;
	InChI InChI=1S/C2H2O4.2Cs/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);;/q;2*+1/p-2 Key: HEQUOWMMDQTGCX-UHFFFAOYSA-L;
	SMILES C(=O)(C(=O)[O-])[O-].[Cs+].[Cs+];
Properties
Chemical formula	C2Cs2O4
Molar mass	353.829 g·mol−1
Hazards
GHS pictograms
GHS Signal word	Warning
GHS hazard statements	H302, H312
GHS precautionary statements	P264, P270, P280, P301+312, P302+352, P312, P322, P330, P363, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Caesium oxalate (standard IUPAC spelling) dicesium oxalate, or cesium oxalate (American spelling) is the oxalate of caesium. Caesium oxalate has the chemicals formula of Cs₂C₂O₄. Not much is known about caesium oxalate.

Preparation

Caesium oxalate can be prepared by passing carbon monoxide and carbon dioxide over caesium carbonate at 380 °C:[1]

Cs₂CO₃ + CO + CO₂ → Cs₂C₂O₄ + CO₂

Other alkali carbonates do not undergo transformation to oxalate.[1]

Chemical Reactions

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

Cs₂C₂O₄ → Cs₂CO₃ + CO

Double salts

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

Examples include: a caesium neptunium oxalate (CsNpO₂C₂O₄•nH₂O).[2]

References

Kudo, Kiyoshi; Ikoma, Futoshi; Mori, Sadayuki; Komatsu, Koichi; Sugita, Nobuyuki (1997). "Synthesis of oxalate from carbon monoxide and carbon dioxide in the presence of caesium carbonate". Journal of the Chemical Society, Perkin Transactions 2 (4): 679–682. doi:10.1039/A607856G.
Charushnikova, I. A.; Krot, N. N.; Polyakova, I. N. (May 2006). "Synthesis and crystal structure of double Np(V) cesium oxalate CsNpO2C2O4 · nH2O". Radiochemistry. 48 (3): 223–226. doi:10.1134/S1066362206030039. S2CID 92883386.

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[kudo-1] Kudo, Kiyoshi; Ikoma, Futoshi; Mori, Sadayuki; Komatsu, Koichi; Sugita, Nobuyuki (1997). "Synthesis of oxalate from carbon monoxide and carbon dioxide in the presence of caesium carbonate". Journal of the Chemical Society, Perkin Transactions 2 (4): 679–682. doi:10.1039/A607856G.

[2] Charushnikova, I. A.; Krot, N. N.; Polyakova, I. N. (May 2006). "Synthesis and crystal structure of double Np(V) cesium oxalate CsNpO2C2O4 · nH2O". Radiochemistry. 48 (3): 223–226. doi:10.1134/S1066362206030039. S2CID 92883386.