Potassium ozonide

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Potassium ozonide
Identifiers
3D model (
JSmol
)
  • InChI=1S/K.HO3/c;1-3-2/h;1H/q+1;/p-1
    Key: VQZSGFOWLNUPQM-UHFFFAOYSA-M
  • [K+].[O-]O[O]
Properties
KO3
Molar mass 87.10 g/mol
Appearance Red crystalline solid
Density 1.990 g/cm3[1]
Melting point 25 °C (77 °F; 298 K) (decomposes)[3]
Reacts
Solubility Soluble in liquid anhydrous ammonia[2]
1.39
Structure[4][5]
I4/mcm
a = 8.597 Å, c = 7.080 Å
8
Related compounds
Other anions
 Potassium fluoride
Potassium chloride
Potassium bromide
Potassium iodide
Other cations
 Sodium ozonide
Rubidium ozonide
Caesium ozonide
Potassium oxide
Potassium peroxide
Potassium superoxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Potassium ozonide is an oxygen rich compound of potassium. It is an ozonide, meaning it contains the ozonide anion (O3−). In polarized light, it shows pleochroism.[1] Hybrid functional calculations have predicted the compound is an insulator with a band gap of 3.0 eV, and has magnetic behavior which departs from the Curie–Weiss law.[6]

The compound can be created by reacting ozone with potassium hydroxide, but the yield is quite low, only 5-10%.[7]

6 KOH + 4 O3 → 4 KO3 + 2 KOH(H2O) + O2

The compound is metastable, and will decompose to potassium superoxide and oxygen, especially if there is any water in the atmosphere. Long-term storage in very dry atmosphere is possible below around 0 °C.[3]

KO3 → KO2 + ½ O2

This compound reacts with water to form potassium hydroxide and potassium superoxide.[4]

References

  1. ^
    ISSN 0568-5230
    .
  2. ^ Makarov, S. Z.; Sokovnin, E. I. (1961). "О РАСТВОРИМОСТИ ОЗОНИДА КАЛИЯ В СЖИЖЕННОМ АММИАКЕ" [Solubility of potassium ozonide in liquified ammonia]. Proceedings of the USSR Academy of Sciences (in Russian). 137 (3): 612–613. English translation
  3. ^
    ISSN 0020-1693
    .
  4. ^
    PMID 16591034
    .
  5. ISSN 0002-7863
    .
  6. PMID 19463009
    .
  7. National Aeronautics and Space Administration
    .
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