Potassium trifluoroacetate

Potassium trifluoroacetate

Identifiers
CAS Number	2923-16-2
3D model (JSmol)	Interactive image
ChemSpider	2015056
ECHA InfoCard	100.018.980
EC Number	220-877-5
PubChem CID	23662811
CompTox Dashboard (EPA)	DTXSID00951841
InChI InChI=1S/C2HF3O2.K/c3-2(4,5)1(6)7;/h(H,6,7);/q;+1/p-1 Key: CUNPJFGIODEJLQ-UHFFFAOYSA-M
SMILES C(=O)(C(F)(F)F)[O-].[K+]
Properties
Chemical formula	CF3COOK
Melting point	135–137 °C (408–410 K) [1]
Boiling point	145 °C (418 K) [1]
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H400, H412
Precautionary statements	P264, P270, P273, P301+P316, P321, P330, P391, P405, P501
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.