三氟乙酸钾

三氟乙酸钾
英文名 Potassium trifluoroacetate
识别
CAS号 2923-16-2
性质
化学式 CF3COOK
熔点 135—137 °C(408—410 K)[1]
沸点 145 °C(418 K)[1]
相关物质
其他阴离子 二氟溴乙酸钾
其他阳离子 三氟乙酸钠
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

三氟乙酸钾是钾的三氟乙酸盐,化学式为CF3COOK。它能够形成一种酸式盐KH(CF3COO)2[2]

制备及性质

三氟乙酸钾可由三氟乙酸和氢氧化钾、碳酸钾或碳酸氢钾反应得到。

CF3COOH + KOH → CF3COOK + H2O

它受热可以分解,并于220 °C达到最大分解速率,产物为氟化钾和一些挥发性产物,如CO2、CO、CF3CFO等。[3]

参考文献

  1. ^ 1.0 1.1 R. Dallenbach, P. Tissot. Properties of molten alkali metal trifluoroacetates: Part I. Study of the binary system CF3COOK-CF3COONa. Journal of Thermal Analysis. 1977-2, 11 (1): 61–69 [2019-03-22]. ISSN 0022-5215. doi:10.1007/BF02104084 (英语). 
  2. ^ A. L. Macdonald, J. C. Speakman, D. Hadži. 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. 1972, (7): 825–832 [2019-03-22]. ISSN 0300-9580. doi:10.1039/P29720000825 (英语). 
  3. ^ M. J. Baillie, D. H. Brown, K. C. Moss, D. W. A. Sharp. Anhydrous metal trifluoroacetates. Journal of the Chemical Society A: Inorganic, Physical, Theoretical. 1968: 3110 [2019-03-22]. ISSN 0022-4944. doi:10.1039/j19680003110 (英语). 

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