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Caesium oxalate 
Summary
Caesium oxalate (standard IUPAC spelling), or dicesium oxalate, or cesium oxalate (American spelling) is a chemical compound with the chemical formula Cs2C2O4. It is a caesium salt of oxalic acid. It consists of caesium cations Cs+ and oxalate anions C2O2−4.
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| Names | |
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| IUPAC name
Caesium oxalate
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| Preferred IUPAC name
Dicaesium oxalate | |
| Identifiers | |
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3D model (JSmol)
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| ECHA InfoCard | 100.012.683 |
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PubChem CID
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| Properties | |
| Cs2C2O4 | |
| Molar mass | 353.829 g·mol−1 |
| Appearance | White solid |
| 76 g/(100 ml) (25 °C)[1] | |
| Hazards | |
| GHS labelling: | |
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| 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).
Infobox references
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Preparation edit
Caesium oxalate can be prepared by passing carbon monoxide and carbon dioxide over caesium carbonate at 380 °C:[2]
- Cs2CO3 + CO → Cs2C2O4
Other alkali 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 edit
Caesium oxalate can be reduced back into caesium carbonate and carbon monoxide by thermal decomposition.
- Cs2C2O4 → Cs2CO3 + CO
Double salts edit
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:
| 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 edit
- ^ Atherton Seidell (1911). Solubilities of Inorganic and Organic Substances. the New York Public Library: D. Van Nostrand Company. p. 83.
- ^ a b 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.
- ^ 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. doi:10.1021/ic0205536. ISSN 0020-1669. PMID 12611516.
- ^ Fester, A.; Bensch, W.; Trömel, M. (March 1992). "Crystal structure of cesium-bis(oxalato)oxo-titanate(IV) hydrate". Inorganica Chimica Acta. 193 (1): 99–103. doi:10.1016/S0020-1693(00)83801-3.
- ^ Bhaumik, B. B.; Chattopadhyay, R. K. (April 1981). "Oxalatooxovanadates (IV)" (PDF). Indian J. Chem. 20A: 417–419.
- ^ Randhawa, B. S. (September 1995). "Mössbauer study on thermal decomposition of cesium tris(oxalato) ferrate(III) dihydrate". Journal of Radioanalytical and Nuclear Chemistry. 201 (1): 57–63. doi:10.1007/bf02204772. S2CID 97013742.
- ^ 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. Bibcode:2004AcCrE..60M.659S. doi:10.1107/S1600536804009626. ISSN 1600-5368.
- ^ 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).
- ^ Lopez, Jordan R.; Akutsu, Hiroki; Martin, Lee (November 2015). "Radical-cation salt with novel BEDT-TTF packing motif containing tris(oxalato)germanate(IV)" (PDF). Synthetic Metals. 209: 188–191. doi:10.1016/j.synthmet.2015.07.019.
- ^ 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. doi:10.1039/b001201g.
- ^ 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. 45 (1): 45–52. doi:10.1016/0022-5088(76)90195-8.
- ^ 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. 37 (2): 427–432. doi:10.1007/BF02055943. ISSN 0368-4466. S2CID 94623703.
- ^ a b c d e f g h i j k Genčova, O.; Šiftar, J. (May 1995). "Synthesis and thermal characteristics of caesium oxalato-metallates of some rare earths". Journal of Thermal Analysis. 44 (5): 1171–1176. doi:10.1007/BF02547547. ISSN 0368-4466. S2CID 94768537.
- ^ 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.
- ^ 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). doi:10.30492/ijcce.2008.6965.
- ^ a b Chernyaev, I. I.; Golovnya, V. A.; Shchelokov, R. N. (1960-07-01). "Aquo-Oxalato-Sulfate Compounds of Uranium" [Aquo-Oxalato-Sulfate Compounds of Uranium]. Zhur. Neorg. Khim. (in Russian). 5. OSTI 4166316.
- ^ 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.
- ^ Kazdobin, K. A.; Diamant, V. A.; Trachevskii, V. V. "MICROWAVE – ASSISTED SYNTHESIS OF BIS (OXALATO) ALKALI METAL BORATES".
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