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Chemical formula. F 2 Kr: Molar mass: 121.795 g·mol −1 Appearance ... Krypton difluoride, KrF 2 is a chemical compound of krypton and fluorine.
Krypton (from Ancient Greek: ... Following the first successful synthesis of xenon compounds in 1962, synthesis of krypton difluoride (KrF 2) was reported in 1963.
Its lighter neighbor, krypton also forms well-characterized compounds, e.g., krypton difluoride. Krypton tetrafluoride was reported in 1963, [104] but was subsequently shown to be a mistaken identification; the compound seems to be very hard to synthesize now (although even the hexafluoride may exist). [105]
Krypton is less reactive than xenon, but several compounds have been reported with krypton in the oxidation state of +2. [40] Krypton difluoride is the most notable and easily characterized. Under extreme conditions, krypton reacts with fluorine to form KrF 2 according to the following equation: Kr + F 2 → KrF 2
Earlier preparations used krypton difluoride as fluorinating agent, and tended to produce the mixed-valence Ag 3 F 8 which may be thought of as silver(II) tetrafluoroargentate(III); Ag 2 F 5, which is (AgF) + AgF 4 −, is formed by reacting AgF 3 with AgFAsF 6.
Krypton difluoride – KrF 2; L. La. Lanthanum aluminium – LaAl; ... Oxygen difluoride – OF 2; Dioxygen difluoride – O 2 F 2; Francium oxide – Fr 2 O ...
Calcium difluoride is a notable compound. In the form of the mineral fluorite it is the major source of commercial fluorine. It also has an eponymic crystal structure, which is an end member of the spectrum starting from bixbyite and progressing through pyrochlore .
This yielded a crystalline product, xenon hexafluoroplatinate, whose formula was proposed to be Xe + [PtF 6] −. [4] [7] It was later shown that the compound is actually more complex, containing both [XeF] + [PtF 5] − and [XeF] + [Pt 2 F 11] −. [8] Nonetheless, this was the first real compound of any noble gas.