Caesium oxalate

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Not to be confused with cerium oxalate.
Caesium oxalate
Names
IUPAC name
Caesium oxalate
Preferred IUPAC name
Dicaesium oxalate
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.012.683 Edit this at Wikidata
EC Number
  • 213-950-8
UNII
  • 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
  • C(=O)(C(=O)[O-])[O-].[Cs+].[Cs+]
Properties
Cs2C2O4
Molar mass 353.829 g·mol−1
Appearance White solid
76 g/(100 ml) (25 °C)[1]
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H312
P264, P270, P280, P301+P312, P302+P352, 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).

Caesium oxalate (standard IUPAC spelling), or dicesium oxalate, or cesium oxalate (American spelling) is a

anions
C2O2−4.

Preparation

Caesium oxalate can be prepared by passing carbon monoxide and carbon dioxide over caesium carbonate at 380 °C:[2]

Cs2CO3 + CO → Cs2C2O4

Other

carbonates do not undergo transformation to oxalate.[2]

Caesium carbonate can react with oxalic acid in aqueous solution to give caesium oxalate.[3]

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.

Cs2C2O4 → Cs2CO3 + CO

Double salts

Compounds that contain caesium and another

double salts of caesium and oxalate. The oxalate may form a complex with a metal that can make a salt
with caesium.

Examples include:

name formula properties reference
caesium bis(oxalato)oxotitanate(IV) trihydrate Cs4[TiO(C2O4)2]2·3H2O [4]
caesium oxalatooxovanadate(IV) Cs2[VO(C2O4)2] [5]
caesium tris(oxalato) ferrate(III) dihydrate Cs3[Fe(C2O4)3]·2H2O [6]
caesium bis(oxalato) cobaltate(II) tetrahydrate Cs2[Co(C2O4)2]·4H2O [7]
caesium bis(oxalato)nickelate(III) tetrahydrate Cs[Ni(C2O4)2]·4H2O [8]
caesium tris(oxalato)germanate(IV) Cs2[Ge(C2O4)3] [9]
caesium yttrium(III) oxalate monohydrate 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 [10]
caesium (diaquo)bis(oxalato)oxoniobate(V) dihydrate Cs[NbO(C2O4)2(H2O)2]·2H2O [11]
Cs2[NH4]2[Mo3O8(C2O4)3] [12]
tetracaesium dilanthanum(III) oxalate octahydrate Cs4La2(C2O4)5·8H2O [13]
tetracaesium dipraseodymium(III) oxalate octahydrate Cs4Pr2(C2O4)5·8H2O [13]
caesium neodymium(III) oxalate hexahydrate CsNd(C2O4)2·6H2O [13]
caesium samarium(III) oxalate hexahydrate CsSm(C2O4)2·6H2O [13]
caesium dysprosium(III) oxalate hydrate CsDy(C2O4)2·?H2O [13]
caesium gadolinium(III) oxalate sesquihydrate CsGd(C2O4)2·1.5H2O [13]
caesium terbium(III) oxalate sesquihydrate CsTb(C2O4)2·1.5H2O [13]
caesium dysprosium(III) oxalate sesquihydrate CsDy(C2O4)2·1.5H2O [13]
caesium holmium(III) oxalate sesquihydrate CsHo(C2O4)2·1.5H2O [13]
caesium ytterbium(III) oxalate sesquihydrate CsYb(C2O4)2·1.5H2O [13]
caesium lutetium(III) oxalate sesquihydrate CsLu(C2O4)2·1.5H2O [13]
dicaesium dioxotungsten(VI) oxalate Cs2[WO2](C2O4)2 [14]
dicaesium dioxotungsten(VI) difluoride monooxalate Cs2[WO2]F2(C2O4) [14]
caesium tris(oxalato)rhenate(III) Cs3[Re(C2O4)3] [15]
dicaesium uranyl monooxalate monosulfate dihydrate Cs2[UO2](C2O4)(SO4)·2H2O [16]
ammonium caesium uranyl monooxalate monosulfate dihydrate [NH4]Cs[UO2](C2O4)(SO4)·2H2O [16]
caesium dioxoneptunium(VI) oxalate hydrate Cs[NpO2]C2O4·nH2O [17]

Mixed anion compounds containing caesium, oxalate and another anion also exist, such as the uranyl sulfate above, and caesium bis(oxalato)borate (CsBOB) (Cs[B(C2O4)2]).[18]

References

  1. ^ Atherton Seidell (1911). Solubilities of Inorganic and Organic Substances. the New York Public Library: D. Van Nostrand Company. p. 83.
  2. ^
    doi:10.1039/A607856G
    .
  3. PMID 12611516
    .
  4. doi:10.1016/S0020-1693(00)83801-3
    .
  5. ^ Bhaumik, B. B.; Chattopadhyay, R. K. (April 1981). "Oxalatooxovanadates (IV)" (PDF). Indian J. Chem. 20A: 417–419.
  6. S2CID 97013742
    .
  7. ISSN 1600-5368
    .
  8. ^ 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 (in Russian).
  9. doi:10.1016/j.synthmet.2015.07.019
    .
  10. doi:10.1039/b001201g
    .
  11. doi:10.1016/0022-5088(76)90195-8
    .
  12. S2CID 94623703
    .
  13. ^
    S2CID 94768537
    .
  14. ^ a b Sengupta, A. K.; Bhaumik, B. B.; Nath, S. K. (June 1983). "Oxalatofluorotungstates (VI) & Oxalatotungstates (VI) of Some Alkali Metals & Complex Cations" (PDF). Indian Journal of Chemistry. 22A: 535–536.
  15. doi:10.30492/ijcce.2008.6965
    .
  16. ^
    OSTI 4166316
    .
  17. S2CID 92883386
    .
  18. ^ Kazdobin, K. A.; Diamant, V. A.; Trachevskii, V. V. "MICROWAVE – ASSISTED SYNTHESIS OF BIS (OXALATO) ALKALI METAL BORATES". {{cite journal}}: Cite journal requires |journal= (help)
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