Chemistry
Krypton difluoride is primarily a powerful oxidising and fluorinating agent. It can oxidise gold to its highest-known oxidation state, +5:
- 7 KrF2 (g) + 2 Au (s) → 2 KrF+
AuF−
6 (s) + 5 Kr (g)
KrF+
AuF−
6 decomposes at 60°C into gold(V) fluoride and krypton and fluorine gases:
- KrF+
AuF−
6 → AuF5 (s) + Kr (g) + F2 (g)
KrF2 can also directly oxidise xenon to xenon hexafluoride:
- 3 KrF2 + Xe → XeF6 + 3 Kr
KrF2 is used to synthesize the highly reactive BrF+
6 cation. KrF2 reacts with SbF5 to form the salt KrF+
SbF−
6; the KrF+
cation is capable of oxidising both BrF5 and ClF5 to BrF+
6 and ClF+
6, respectively.
Read more about this topic: Krypton Difluoride
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