Potassium trifluoroacetate

Potassium trifluoroacetate

Identifiers
CAS Number	2923-16-2
ECHA InfoCard	100.018.980
CompTox Dashboard (EPA)	DTXSID00951841
Properties
Chemical formula	CF3COOK
Melting point	135–137 °C (408–410 K)[1]
Boiling point	145 °C (418 K)[1]
Related compounds
Other anions	Potassium difluorobromoacetate
Other cations	Sodium trifluoroacetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Potassium trifluoroacetate is the trifluoroacetate salt of potassium, with the chemical formula CF₃COOK. It can form an acid salt KH(CF₃COO)₂.^[2]

Preparation and properties

Potassium trifluoroacetate can be obtained by reacting trifluoroacetic acid with potassium hydroxide, potassium carbonate or potassium bicarbonate.

CF₃COOH + KOH → CF₃COOK + H₂O

It can decompose when heated and reaches the maximum decomposition rate at 220 °C. The products are potassium fluoride and some volatile products, such as carbon dioxide, carbon monoxide, trifluoroacetyl fluoride, etc.^[3]

References

1. R. Dallenbach, P. Tissot (Feb 1977). "Properties of molten alkali metal trifluoroacetates: Part I. Study of the binary system CF3COOK-CF3COONa". Journal of Thermal Analysis. 11 (1): 61–69. doi:10.1007/BF02104084. ISSN 0022-5215. Retrieved 2019-03-22.
2. A. L. Macdonald, J. C. Speakman, D. Hadži (1972). "Crystal structures of the acid salts of some monobasic acids. Part XIV. Neutron-diffraction studies of potassium hydrogen bis(trifluoroacetate) and potassium deuterium bis(trifluoroacetate): crystals with short and symmetrical hydrogen bonds". J. Chem. Soc., Perkin Trans. 2 (7): 825–832. doi:10.1039/P29720000825. ISSN 0300-9580. Retrieved 2019-03-22.
3. M. J. Baillie, D. H. Brown, K. C. Moss, D. W. A. Sharp (1968). "Anhydrous metal trifluoroacetates". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 3110. doi:10.1039/j19680003110. ISSN 0022-4944. Retrieved 2019-03-22.