The number of isolable compounds which contain different noble-gas−element bonds is limited for xenon and even more so for krypton. Adducts of xenon trioxide[1], XeO3, and halide ions were described prior to this work and provide examples of Xe−F[2] and Xe−Cl[3] bonds. The syntheses, isolation, and characterizations of the first compounds to contain Xe−Br bonds are described in this work[4]. The reactions of XeO3 with [N(R)4]Br (R = C2H5, CH3) yielded the first bromoxenate(VI) salts, [N(C2H5)4]3[Br3(XeO3)3] and [N(CH3)4]4[Br4(XeO3)4], in which the cage anions have Xe–Br bond lengths that range from 3.0838(3) to 3.3181(8) Å. The isostructural chloroxenate(VI) anions were synthesized by analogy with their bromine counterparts. The bromoxenate(VI) and chloroxenate(VI) salts are stable under ambient conditions and were characterized by Raman spectroscopy, low-temperature single-crystal X-ray diffraction, and quantum-chemical calculations.

Interaction of xenon trioxide (XeO3) with halide ions

256th National Meeting (2018)

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