Krypton difluoride reactions

Krypton difluoride cannot be synthesized by the standard high pressure-high temperature means used to prepare xenon fluorides because of the low thermal stabitity of KrF. There are three low temperature methods which have proven practical for the preparation of gram and greater amounts of KrF (141—143). Radon fluoride is most conveniently prepared by reaction of radon gas with a tiquid halogen fluoride (CIE, CIE, CIE, BrE, or lE ) at room temperature (144,145). 

Radon difluoride is quantitatively reduced to elemental radon by water in a reaction which is analogous to the reactions of krypton difluoride and xenon difluoride with water. Complex salts of radon also hydrolyze in this fashion. 

Numerous other reactions of krypton difluoride are known, but they will not be reviewed here. The chemistry of krypton is well established, but it is still much less extensive than that of xenon. Although a rather extensive chemistry of the noble gases has developed, the vast majority of the studies have dealt with the xenon compounds. 

Prp4 is much more difficult and was obtained in early studies only be extracting sodium fluoride with anhydrous fluoric acid from complex compounds like Na2Prp6 (Soriano et al., 1966 Asprey et al., 1967). The products, however, were not free of impurities in most cases. The major breakthrough came from Spitsyn et al. (1974) who prepared pure PrP4 by solid state reaction of krypton difluoride with PreOn or Pr02 at room temperature ... 

Krypton difluoride (KrF2) can be synthesized from the elements in a number of different ways, including low temperature photolysis. It is considerably less stable than XeF2, as shown by the following reaction enthalpies ... 

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