1068-63-9Relevant articles and documents
Crystal and molecular structures of alkali oxalates: First proof of a staggered oxalate anion in the solid state
Dinnebier, Robert E.,Vensky, Sascha,Panthoefer, Martin,Jansen, Martin
, p. 1499 - 1507 (2003)
The molecular and crystal structures of solvent-free potassium, rubidium, and cesium oxalates have been determined ab initio from high-resolution synchrotron and X-ray laboratory powder patterns. In the case of potassium oxalate K2C2O4 (a = 10.91176(7) A, b = 6.11592(4) A, c = 3.44003(2) A, orthorhombic, Pbam, Z = 2), the oxalate anion is planar, whereas in cesium oxalate Cs2C2O4 (a = 6.62146(5) A, b = 11.00379(9) A, c = 8.61253(7) A, β = 97.1388(4)°, monoclinic, P21/c, Z = 4) it exhibits a staggered conformation. For rubidium oxalate at room temperature, two polymorphs exist, one (β-Rb2C2O4) isotypic to potassium oxalate (a = 11.28797(7) A, b = 6.29475(4) A, c = 3.62210(2) A, orthorhombic, Pbam, Z = 2) and the other (α-Rb2C2O4) isotypic to cesium oxalate (a = 6.3276(1) A, b = 10.4548(2) A, c = 8.2174(2) A, β = 98.016(1)°, monoclinic, P21/c, Z = 4). The potassium oxalate structure can be deduced from the AIB2 type, and the cesium oxalate structure from the Hg99As type, respectively. The relation between the two types of crystal structures and the reason for the different conformations of the oxalate anion are discussed.
Novel Synthesis of Oxalate from Carbon Dioxide and Carbon Monoxide in the Presence of Caesium Carbonate
Kudo, Kiyoshi,Ikoma, Futoshi,Mori, Sadayuki,Komatsu, Koichi,Sugita, Nobuyuki
, p. 633 - 634 (1995)
In the presence of caesium carbonate 1, the direct reaction of CO2 (110 atm) with CO (20 atm) results in reductive capture of CO2 to give caesium oxalate 2 in good yield at elevated temperature (380 deg C).
X-ray, thermal and infrared spectroscopic studies on potassium, rubidium and caesium uranyl oxalate hydrates
Dahale,Chawla,Venugopal
, p. 107 - 117 (2000)
M2UO2(C2O4)2·nH2O compounds (M = K, Rb and Cs) have been prepared and characterized by chemical and thermal analyses as well as by X-ray diffraction and infrared spectroscopy. X-ray powder
DISUBSTITUTED OXALATE AND DISUBSTITUTED CARBONATE PRODUCTION FROM AN OXALATE SALT AND ALCOHOL
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Paragraph 0070, (2020/02/16)
Processes for producing a disubstituted oxalate and/or disubstituted carbonate are disclosed. The processes use a water removal agent to tune the amount of disubstituted oxalate and/or disubstituted carbonate in the product mixture. One process includes contacting a cesium salt with one or more alcohols in the presence of an effective amount of a water removal agent under a carbon dioxide (CO2) atmosphere and reaction conditions sufficient to produce a composition that includes a disubstituted oxalate. Methanol can be used to produce dimethyl oxalate.
PROCESS FOR THE PREPARATION OF OXALIC ACID ESTERS FROM CESIUM OXALATE
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Paragraph 0031; 0051, (2018/09/08)
Processes for producing a disubstituted oxalate are disclosed. The process includes contacting a cesium salt with one or more alcohols and carbon dioxide (CO2) under reaction conditions sufficient to produce a composition comprising a disubstituted oxalate.
CONVERSION OF CESIUM CARBONATE TO CESIUM OXALATE
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Paragraph 0089, (2018/08/20)
Processes for producing a disubstituted oxalate are disclosed. The process includes contacting a cesium salt with one or more alcohols and carbon dioxide (CO2) under reaction conditions sufficient to produce a composition comprising a disubstituted oxalate.
