Cesium acetate
Crystal structure | ||||||||||||||||
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__ Cs __ O __ C | ||||||||||||||||
Crystal system |
hexagonal |
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Space group |
P 6 / m (No. 175) |
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Lattice parameters |
a = 1488.0 pm , c = 397.65 pm |
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General | ||||||||||||||||
Surname | Cesium acetate | |||||||||||||||
other names |
Cesium ethanoate (according to IUPAC ) |
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Ratio formula | C 2 H 3 CsO 2 | |||||||||||||||
Brief description |
white, odorless, hygroscopic solid. |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 191.96 g · mol -1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
194 ° C |
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solubility |
100 g / l at 11 ° C |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Cesium acetate is the cesium salt of acetic acid with the constitutional formula CH 3 COOCs or in the inorganic salt notation Cs (CH 3 COO).
Extraction and presentation
Cesium acetate can be produced from cesium hydroxide and acetic acid by the salt formation reaction .
The synthesis from cesium carbonate and acetic acid with the evolution of carbon dioxide is also possible.
properties
Anhydrous cesium acetate crystallizes in the hexagonal crystal system in the space group P 6 / m (space group no. 175) with the lattice parameters a = 1488.0 pm and c = 397.65 pm. In the unit cell contains six formula units .
The thermal decomposition of cesium acetate is complete at 450 ° C. Cesium oxide is the end product .
use
Cesium acetate is used as a reagent in the Perkin reaction , where it can replace the otherwise common sodium acetate .
Individual evidence
- ↑ a b data sheet cesium acetate from Acros, accessed on May 20, 2010.
- ↑ Data sheet Cesium acetate (PDF) from Strem, accessed on December 25, 2012.
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Inorganic Compounds, pp. 4-57.
- ↑ a b data sheet Cesium acetate from Sigma-Aldrich , accessed on May 25, 2011 ( PDF ).
- ↑ J. Hatibarua, GS Parry: A crystallographic study of the acetates of potassium, rubidium and cesium . In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry . 28, No. 10, October 15, 1972, pp. 3099-3100. doi : 10.1107 / S0567740872007496 . Retrieved July 1, 2012.
- ↑ A. Lossin, G. Meyer: "Crystal structure of cesium acetate, Cs (CH 3 COO)" in Journal for inorganic and general chemistry , 1993 , 619 (8), pp. 1462-1464; doi : 10.1002 / zaac.19936190823 .
- ↑ U. Meyer, H. Gorzawski, WF Hölderich: "Michael addition of ethyl acrylate and acetone over solid bases" in Catalysis Letters , 1999 , 59 , pp. 201-206; doi : 10.1023 / A: 1019020504961 .
- ↑ E. Koepp, F. Vögtle: “Perkin synthesis with cesium acetate” in Synthesis , 1987 , 1987 (2), pp. 177-179; doi : 10.1055 / s-1987-27880 .