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Krypton difluoride

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Chemical structure of krypton difluoride

Krypton difluoride is an inorganic compound with formula KrF2.

Table of contents
  1. 1Names
  2. 2Formulae and structures
  3. 3Properties
  4. 4Constituents
  5. 5Thermodynamic properties
  6. 6Solubility
  7. 7Preparations
  8. 8Chemical reactions
  9. 9References
  10. 10Related substances
  11. 11Related categories
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Names

List of substance names

Nomenclature
Name
Typical name
Krypton difluoride
Compositional nomenclature
Krypton difluoride
Additive nomenclature
Difluoridokrypton
Other names
Difluorokrypton

Formulae and structures

List of formulae

Formula name
Formula
Typical formula
KrF2
Molecular formula
KrF2
Compositional formula
KrF2
Structural formula
Chemical structure of krypton difluoride
Structural formula with no lone pair
Chemical structure of krypton difluoride with no lone pair
Lewis structure
Lewis structure of krypton difluoride
Colored Lewis structure
Colored Lewis structure of krypton difluoride

Properties

List of substance properties

Item
Value
Name
Krypton difluoride
Formula
KrF2
Appearance
Colorless gas
Odor
Pungent odor
Molar mass
121.794 g/mol
Density
3.24 g/cm3[1]
Solid
Melting point
–
Boiling point
–
Subliming point
−60 °C[1]

Constituents

Constituent atoms

AtomNameOxidation stateNumber
KrKrypton+21
FFluorine−12

Ratio of atoms

AtomAtomic weightNumberAtomic ratioWeight ratio
Kr83.798133.33%68.80%
F18.998266.67%31.20%
KrFAtomic ratio
KrFWeight ratio

Thermodynamic properties

Phase transition properties

Item
Value
Enthalpy of fusion
–
Enthalpy of vaporization
–
Enthalpy of vaporization at 25°C
–
Enthalpy of other transition
–

Solubility

Qualitative solubility

Reactive
H2OWater
Miscible
Very soluble
Soluble
HF (aq)[1]Hydrofluoric acid
Slightly soluble
Very slightly soluble
Insoluble

Preparations

Reaction of nonmetal and nonmetal

The reaction of krypton and fluorine yields krypton difluoride.

Reaction of krypton and fluorine
KrKrypton + F2Fluorine
⟶
KrF2Krypton difluoride

Chemical reactions

Reaction with reducing species

The reaction of reducing species and krypton difluoride yields a variety of products.

Reaction of hydrogen and krypton difluoride
H2Hydrogen + KrF2Krypton difluoride
⟶
KrKrypton + 2HFHydrogen fluoride
Reaction of sodium and krypton difluoride
2NaSodium + KrF2Krypton difluoride
⟶
2NaFSodium fluoride + KrKrypton
Reaction of hydrogen sulfide and krypton difluoride
H2SHydrogen sulfide + KrF2Krypton difluoride
⟶
SSulfur + KrKrypton + 2HFHydrogen fluoride

Reaction with oxidizable species

The reaction of oxidizable species and krypton difluoride yields a variety of products.

Reaction of copper and krypton difluoride
CuCopper + KrF2Krypton difluoride
🔥
⟶
CuF2Copper(II) fluoride + KrKrypton
Reaction of copper and krypton difluoride
2CuCopper + KrF2Krypton difluoride
🔥
⟶
2CuFCopper(I) fluoride + KrKrypton
Reaction of potassium iodide and krypton difluoride
2KIPotassium iodide + KrF2Krypton difluoride
⟶
2KFPotassium fluoride + I2Iodine + KrKrypton
Reaction of iron(II) oxide and krypton difluoride
6FeOIron(II) oxide + 3KrF2Krypton difluoride
⟶
2Fe2O3Iron(III) oxide + 2FeF3Iron(III) fluoride + 3KrKrypton
Reaction of iron(II) oxide and krypton difluoride
2FeOIron(II) oxide + 3KrF2Krypton difluoride
⟶
2FeF3Iron(III) fluoride + O2Oxygen + 3KrKrypton

Reaction with oxidizable species under neutral condition

The reaction of oxidizable species, krypton difluoride, and water yields a variety of products.

Reaction of potassium iodide and krypton difluoride under neutral condition
KIPotassium iodide + 3KrF2Krypton difluoride + 3H2OWater
⟶
KIO3Potassium iodate + 3KrKrypton + 6HFHydrogen fluoride
Reaction of iron(II) oxide and krypton difluoride under neutral condition
6FeOIron(II) oxide + 3KrF2Krypton difluoride + 6H2OWater
⟶
4Fe(OH)3Iron(III) hydroxide + 2FeF3Iron(III) fluoride + 3KrKrypton

Reaction with hardly oxidizable species

The reaction of hardly oxidizable species and krypton difluoride yields a variety of products.

Reaction of hydrogen chloride and krypton difluoride
2HClHydrogen chloride + KrF2Krypton difluoride
⟶
Cl2Chlorine + KrKrypton + 2HFHydrogen fluoride
Reaction of sodium chloride and krypton difluoride
2NaClSodium chloride + KrF2Krypton difluoride
⟶
2NaFSodium fluoride + Cl2Chlorine + KrKrypton

Reaction with hardly oxidizable species under neutral condition

The reaction of hardly oxidizable species, krypton difluoride, and water yields a variety of products.

Reaction of sodium chloride and krypton difluoride under neutral condition
NaClSodium chloride + 4KrF2Krypton difluoride + 4H2OWater
⟶
NaClO4Sodium perchlorate + 4KrKrypton + 8HFHydrogen fluoride
Reaction of sodium chloride and krypton difluoride under neutral condition
NaClSodium chloride + 3KrF2Krypton difluoride + 3H2OWater
⟶
NaClO3Sodium chlorate + 3KrKrypton + 6HFHydrogen fluoride

References

List of references

  1. 1
    James G. Speight (2017)
    Lange's Handbook of Chemistry, 17th edition
    McGraw Hill Education
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