Krypton difluoride

Krypton (II ) fluoride

Fixed ( known only at low temperatures )

3.24 g · cm -3

77 ° C.

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Kryptondifluorid is an unstable chemical compound of krypton and fluorine. It is one of the few known crypto connections and the first synthesized compound of this noble gas.

Production and representation

Manufactured Kryptondifluorid at -196 ° C using electric discharges elemental krypton and fluorine in an endothermic with 60 kJ / mol reaction. More recovery options are the UV photolysis and the bombardment of krypton / fluorine mixtures with protons. In each case fluorine radicals, which are able to react with krypton arise.

Physical Properties

Kryptondifluorid has a linear structure, the bond length in the gaseous state is 188.9 pm.

Chemical Properties

Kryptondifluorid is unstable and decomposes at room temperature within a few days. At 77 ° C, the compound sublimed at faster decomposition. With water and organic compounds Kryptondifluorid reacts explosively.

Kryptondifluorid is a strong oxidizing agent, it can be converted into xenon xenon hexafluoride or iodine in iodine pentafluoride. In addition, there is also a fluoride ion donor. The cation KrF is the strongest oxidizing agents known, more so than oxygen difluoride and elemental fluorine. It can be the only substance known to bring gold in the oxidation state 5: