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:
Other alkali carbonates do not undergo transformation to oxalate.
Caesium carbonate can react with oxalic acid in aqueous solution to give caesium oxalate.
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: nameformulapropertiesreferencecaesium bis(oxalato)oxotitanate(IV) trihydratecaesium oxalatooxovanadate(IV)caesium tris(oxalato) ferrate(III) dihydratecaesium bis(oxalato) cobaltate(II) tetrahydratecaesium bis(oxalato)nickelate(III) tetrahydratecaesium tris(oxalato)germanate(IV)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/ncaesium (diaquo)bis(oxalato)oxoniobate(V) dihydratetetracaesium dilanthanum(III) oxalate octahydratetetracaesium dipraseodymium(III) oxalate octahydratecaesium neodymium(III) oxalate hexahydratecaesium samarium(III) oxalate hexahydratecaesium dysprosium(III) oxalate hydratecaesium gadolinium(III) oxalate sesquihydratecaesium terbium(III) oxalate sesquihydratecaesium dysprosium(III) oxalate sesquihydratecaesium holmium(III) oxalate sesquihydratecaesium ytterbium(III) oxalate sesquihydratecaesium lutetium(III) oxalate sesquihydratedicaesium dioxotungsten(VI) oxalatedicaesium dioxotungsten(VI) difluoride monooxalatecaesium tris(oxalato)rhenate(III)dicaesium uranyl monooxalate monosulfate dihydrateammonium caesium uranyl monooxalate monosulfate dihydratecaesium dioxoneptunium(VI) oxalate hydrate Mixed anion compounds containing caesium, oxalate and another anion also exist, such as the uranyl sulfate above, and caesium bis(oxalato)borate (CsBOB) ().
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