High-Pressure Reactivity of Kr and F2—Stabilization of Krypton in the +4 Oxidation State
AbstractSince the synthesis of the first krypton compound, several other Kr-bearing connections have been obtained. However, in all of them krypton adopts the +2 oxidation state, in contrast to xenon which forms numerous compounds with an oxidation state as high as +8. Motivated by the possibility of thermodynamic stabilization of exotic compounds with the use of high pressure (exceeding 1 GPa = 10 kbar), we present here theoretical investigations into the chemistry of krypton and fluorine at such large compression. In particular we focus on krypton tetrafluoride, KrF4, a molecular crystal in which krypton forms short covalent bonds with neighboring fluorine atoms thus adopting the +4 oxidation state. We find that this hitherto unknown compound can be stabilized at pressures below 50 GPa. Our results indicate also that, at larger compressions, a multitude of other KrmFn fluorides should be stable, among them KrF which exhibits covalent Kr–Kr bonds. Our results set the stage for future high-pressure synthesis of novel krypton compounds. View Full-Text
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Kurzydłowski, D.; Sołtysiak, M.; Dżoleva, A.; Zaleski-Ejgierd, P. High-Pressure Reactivity of Kr and F2—Stabilization of Krypton in the +4 Oxidation State. Crystals 2017, 7, 329.
Kurzydłowski D, Sołtysiak M, Dżoleva A, Zaleski-Ejgierd P. High-Pressure Reactivity of Kr and F2—Stabilization of Krypton in the +4 Oxidation State. Crystals. 2017; 7(11):329.Chicago/Turabian Style
Kurzydłowski, Dominik; Sołtysiak, Magdalena; Dżoleva, Aleksandra; Zaleski-Ejgierd, Patryk. 2017. "High-Pressure Reactivity of Kr and F2—Stabilization of Krypton in the +4 Oxidation State." Crystals 7, no. 11: 329.
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