Caesium acetate

Caesium acetate^[1]

Names
IUPAC name Caesium acetate
Other names Cesium acetate
Identifiers
CAS Number	3396-11-0 Y
3D model (Jmol)	Interactive image
ChemSpider	141192 Y
ECHA InfoCard	100.020.226
PubChem	160687
InChI InChI=1S/C2H4O2.Cs/c1-2(3)4;/h1H3,(H,3,4);/q;+1/p-1 Y Key: ZOAIGCHJWKDIPJ-UHFFFAOYSA-M Y InChI=1/C2H4O2.Cs/c1-2(3)4;/h1H3,(H,3,4);/q;+1/p-1 Key: ZOAIGCHJWKDIPJ-REWHXWOFAB
SMILES [Cs+].[O-]C(=O)C
Properties
Chemical formula	C2H3CsO2
Molar mass	191.949 g/mol
Appearance	colourless, hygroscopic
Density	2.423 g/cm3, solid
Melting point	194 °C (381 °F; 467 K)
Boiling point	945 °C (1,733 °F; 1,218 K)
Solubility in water	945.1 g/100 g (−2.5 °C) 1345.5 g/100 ml (88.5 °C)
Hazards
Flash point	Non-flammable
Related compounds
Other anions	Caesium formate
Other cations	Lithium acetate Sodium acetate Potassium acetate Rubidium acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Caesium acetate or cesium acetate is an ionic caesium compound with the molecular formula CH₃CO₂Cs often used in organic synthesis especially in Perkin synthesis; formation of unsaturated cinnamic-type acids by the condensation of aromatic aldehydes with fatty acids.^[2]

It may be formed by the reaction of caesium hydroxide or caesium carbonate with acetic acid. Caesium acetate holds the record for the highest density of an aqueous solution (1010 g CsOAc per 100 mL H₂O. i.e. 91% w/w). This is not so much due its molar solubility (only 5.26 M) but more due to its high molar weight. Caesium acetate is occasionally used instead of caesium formate in petroleum drilling fluids.

References

Further reading

• Torisawa, Yasuhiro; Okabe, Hiromitsu; Ikegami, Shiro (1984), "Efficient Inversions of Secondary Alcohols using Cesium Acetate and 18-Crown-6", Chem. Lett., 13 (9): 1555–56, doi:10.1246/cl.1984.1555 .

External links

• Caesium acetate factsheet from Chemetall GmbH