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Thermal stability and crystal structure of potassium fluoride monoperoxosolvate KF·H2O2

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Abstract

Potassium fluoride peroxosolvate KF-H2O2 was obtained upon action of a 30% aqueous solution of hydrogen peroxide on solid potassium fluoride dihydrate. As compared to other peroxosolvates, KF-H2O2 is characterized by the highest thermal stability: the decomposition rate constantk 1, at 120°C is 1.4 10−3 min−1, the enthalpy of H2O2 addition to KF is 8.1 kcal/ mol. The correlation between the high stability of KF-H2O2 and the absence of catalytic properties of KF towards H2O2, and the formation of strong intermolecular O-H...F and intramolecular O-H...O hydrogen bonds in the crystal is discussed.

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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 38–44, January, 1993.

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Titova, K.V., D'yachenko, O.A., Gritsenko, V.V. et al. Thermal stability and crystal structure of potassium fluoride monoperoxosolvate KF·H2O2 . Russ Chem Bull 42, 30–35 (1993). https://doi.org/10.1007/BF00699969

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Key words

  • peroxosolvates
  • potassium fluoride
  • monoperoxosolvate
  • thermal stability
  • crystal structure
  • hydrogen bond