Caesium oxalate explained

Caesium oxalate (standard IUPAC spelling), or dicesium oxalate, or cesium oxalate (American spelling) is a chemical compound with the chemical formula . It is a caesium salt of oxalic acid. It consists of caesium cations and oxalate anions .

Preparation

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

Other alkali carbonates do not undergo transformation to oxalate.

Caesium carbonate can react with oxalic acid in aqueous solution to give caesium oxalate.[2]

Chemical Reactions

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

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:

nameformulapropertiesreference
caesium bis(oxalato)oxotitanate(IV) trihydrate[3]
caesium oxalatooxovanadate(IV)[4]
caesium tris(oxalato) ferrate(III) dihydrate[5]
caesium bis(oxalato) cobaltate(II) tetrahydrate[6]
caesium bis(oxalato)nickelate(III) tetrahydrate[7]
caesium tris(oxalato)germanate(IV)[8]
caesium yttrium(III) oxalate monohydratemonoclinic a = 8.979, b = 6.2299, c = 8.103 Å, β = 90.05° V = 453.3 Å3, space group P2/n[9]
caesium (diaquo)bis(oxalato)oxoniobate(V) dihydrate[10]
[11]
tetracaesium dilanthanum(III) oxalate octahydrate[12]
tetracaesium dipraseodymium(III) oxalate octahydrate
caesium neodymium(III) oxalate hexahydrate
caesium samarium(III) oxalate hexahydrate
caesium dysprosium(III) oxalate hydrate
caesium gadolinium(III) oxalate sesquihydrate
caesium terbium(III) oxalate sesquihydrate
caesium dysprosium(III) oxalate sesquihydrate
caesium holmium(III) oxalate sesquihydrate
caesium ytterbium(III) oxalate sesquihydrate
caesium lutetium(III) oxalate sesquihydrate
dicaesium dioxotungsten(VI) oxalate
dicaesium dioxotungsten(VI) difluoride monooxalate[13]
caesium tris(oxalato)rhenate(III)[14]
dicaesium uranyl monooxalate monosulfate dihydrate
ammonium caesium uranyl monooxalate monosulfate dihydrate[15]
caesium dioxoneptunium(VI) oxalate hydrate[16]
Mixed anion compounds containing caesium, oxalate and another anion also exist, such as the uranyl sulfate above, and caesium bis(oxalato)borate (CsBOB) .[17]

Notes and References

  1. Kudo . Kiyoshi . Ikoma . Futoshi . Mori . Sadayuki . Komatsu . Koichi . Sugita . Nobuyuki . Synthesis of oxalate from carbon monoxide and carbon dioxide in the presence of caesium carbonate . Journal of the Chemical Society, Perkin Transactions 2 . 1997 . 4 . 679–682 . 10.1039/A607856G.
  2. Dinnebier. Robert E.. Vensky. Sascha. Panthöfer. Martin. Jansen. Martin. 2003-03-01. Crystal and Molecular Structures of Alkali Oxalates: First Proof of a Staggered Oxalate Anion in the Solid State. Inorganic Chemistry. 42. 5. 1499–1507. 10.1021/ic0205536. 12611516. 0020-1669.
  3. Fester . A. . Bensch . W. . Trömel . M. . Crystal structure of cesium-bis(oxalato)oxo-titanate(IV) hydrate . Inorganica Chimica Acta . March 1992 . 193 . 1 . 99–103 . 10.1016/S0020-1693(00)83801-3.
  4. Bhaumik . B. B. . Chattopadhyay . R. K. . Oxalatooxovanadates (IV) . Indian J. Chem. . April 1981 . 20A . 417–419 .
  5. Randhawa . B. S. . Mössbauer study on thermal decomposition of cesium tris(oxalato) ferrate(III) dihydrate . Journal of Radioanalytical and Nuclear Chemistry . September 1995 . 201 . 1 . 57–63 . 10.1007/bf02204772. 97013742.
  6. Schwendtner. Karolina. Kolitsch. Uwe. 2004-05-15. Cs 2 Co II (C 2 O 4) 2 ·4H 2 O. Acta Crystallographica Section E. 60. 5. m659–m661. 10.1107/S1600536804009626. 2004AcCrE..60M.659S . 1600-5368.
  7. Modebadze. M. E.. 1987. Study of oxalate compounds of nickel. Investigations in Chemistry of Complexes and Compounds of Certain Transition and Rare Metals. No. 4. Russian.
  8. Lopez . Jordan R. . Akutsu . Hiroki . Martin . Lee . Radical-cation salt with novel BEDT-TTF packing motif containing tris(oxalato)germanate(IV) . Synthetic Metals . November 2015 . 209 . 188–191 . 10.1016/j.synthmet.2015.07.019.
  9. Bataille. Thierry. Auffrédic. Jean-Paul. Louër. Daniel. 2000. Crystal structure and thermal behaviour of the new layered oxalate Y(H2O)Cs(C2O4)2 studied by powder X-ray diffraction. Journal of Materials Chemistry. 10. 7. 1707–1711. 10.1039/b001201g.
  10. Brničević. N.. Djordjević. C.. February 1976. Co-ordination complexes of niobium and tantalum XVI. salts of oxy-bis-oxalato niobate (V). Journal of the Less Common Metals. en. 45. 1. 45–52. 10.1016/0022-5088(76)90195-8.
  11. Goel. S. P.. Verma. G. R.. Kumar. Sanjive. Sharma. M. P.. February 1991. Preparation of cesium trimolybdate by the thermal decomposition of a new oxomolybdenum(VI) oxalato complex. Journal of Thermal Analysis. en. 37. 2. 427–432. 10.1007/BF02055943. 94623703. 0368-4466.
  12. Genčova. O.. Šiftar. J.. May 1995. Synthesis and thermal characteristics of caesium oxalato-metallates of some rare earths. Journal of Thermal Analysis. en. 44. 5. 1171–1176. 10.1007/BF02547547. 94768537. 0368-4466.
  13. Sengupta . A. K. . Bhaumik . B. B. . Nath . S. K. . Oxalatofluorotungstates (VI) & Oxalatotungstates (VI) of Some Alkali Metals & Complex Cations . Indian Journal of Chemistry . June 1983 . 22A . 535–536 .
  14. Hadadzadeh. Hassan. Rezvani. Ali Reza. Salehi Rad. Ali Reza. Khozeymeh. Elahe. August 2008. A Novel Method for Preparation of Alumina-Supported Rhenium-Cesium Catalyst, Re-Cs/g-Al2O3. Iranian Journal of Chemistry and Chemical Engineering . 27. 3. 10.30492/ijcce.2008.6965.
  15. Chernyaev . I. I. . Golovnya . V. A. . Shchelokov . R. N. . Aquo-Oxalato-Sulfate Compounds of Uranium . Aquo-Oxalato-Sulfate Compounds of Uranium . Zhur. Neorg. Khim. . 1960-07-01 . 5 . 4166316 . Russian.
  16. Charushnikova . I. A. . Krot . N. N. . Polyakova . I. N. . Synthesis and crystal structure of double Np(V) cesium oxalate CsNpO2C2O4 · nH2O . Radiochemistry . May 2006 . 48 . 3 . 223–226 . 10.1134/S1066362206030039. 92883386.
  17. Kazdobin . K. A. . Diamant . V. A. . Trachevskii . V. V. . MICROWAVE – ASSISTED SYNTHESIS OF BIS (OXALATO) ALKALI METAL BORATES .

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