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Its structure was determined by both NMR spectroscopy and X-ray crystallography in 1963. [6] [7] The structure is square planar, as has been confirmed by neutron diffraction studies. [8] According to VSEPR theory, in addition to four fluoride ligands, the xenon center has two lone pairs of electrons. These lone pairs are mutually trans.
An unusual ion containing xenon is the tetraxenonogold(II) cation, AuXe 2+ 4, which contains Xe–Au bonds. [25] This ion occurs in the compound AuXe 4 (Sb 2 F 11) 2, and is remarkable in having direct chemical bonds between two notoriously unreactive atoms, xenon and gold, with xenon acting as a transition metal ligand.
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In the crystal structure of this product the magnesium atom is octahedrally-coordinated and the XeF 2 ligands are axial while the AsF − 6 ligands are equatorial. Many such reactions with products of the form [M x (XeF 2 ) n ](AF 6 ) x have been observed, where M can be calcium , strontium , barium , lead , silver , lanthanum , or neodymium ...
Argon hydride ion [ArH] + was obtained in the 1970s. [19] This molecular ion has also been identified in the Crab nebula, based on the frequency of its light emissions. [20] There is a possibility that a solid salt of [ArF] + could be prepared with [SbF 6] − or [AuF 6] − anions. [21] [22]
Xenon tetroxide is a chemical compound of xenon and oxygen with molecular formula XeO 4, remarkable for being a relatively stable compound of a noble gas.It is a yellow crystalline solid that is stable below −35.9 °C; above that temperature it is very prone to exploding and decomposing into elemental xenon and oxygen (O 2).
The shape of the molecule is a distorted trigonal bipyramid, with the oxygen found on the equator. The atoms on the equator have shorter bond lengths than the fluorine atoms on the axis. In the gas-phase, the sulfur oxygen bond is 1.409Å. A S−F bond on the axis has length 1.596Å and the S−F bond on the equator has length 1.539Å.
The structure of XeF 6 required several years to establish in contrast to the cases of XeF 2 and XeF 4.In the gas phase the compound is monomeric. VSEPR theory predicts that due to the presence of six fluoride ligands and one lone pair of electrons the structure lacks perfect octahedral symmetry, and indeed electron diffraction combined with high-level calculations indicate that the compound's ...