Tetraxenonogold(II)
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Tetraxenonogold(II), gold tetraxenide(II) or AuXeScript error: No such module "Su". is a cationic complex consisting of a central gold atom surrounded by four xenon atoms. It is a covalent complex with a square planar configuration of atoms. The complex is found in the compound AuXeScript error: No such module "Su".(SbScript error: No such module "Su".FScript error: No such module "Su".)Script error: No such module "Su". (tetraxenonogold(II) undecafluorodiantimonate). This compound, which exists in triclinic and tetragonal crystal modifications,[1] has the AuXeScript error: No such module "Su". ion is stabilised by interactions with the fluoride atoms of the counterion. The Au−Xe bond length is Template:Cvt.[2][3] Tetraxenonogold(II) is unusual in that it is a coordination complex of xenon, which is weakly basic. It is also unusual in that it contains gold in the +2 oxidation state. It can be produced by reduction of AuF3 by xenon in the presence of fluoroantimonic acid. The salt crystallises at low temperature.[4] Four xenon atoms bond with the gold(II) ion to make this complex.
It was the first description of a compound between a noble gas and a noble metal. It was first described in 2000 by Konrad Seppelt and Stefan Seidel. Several related compounds containing gold(III)–xenon and gold(I)–xenon bonds have since been isolated. A compound containing a mercury–xenon bond [HgXe]2+[Sb2F11]–[SbF6]– (xenonomercury(II) undecafluorodiantimonate hexafluoroantimonate) has also been isolated.[5]
References
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Template:Xenon compounds Template:Noble gas compounds Template:Gold compounds