Tetraxenonogold(II), gold tetraxenide(II) or AuXe2+4 is a cationic complex consisting of a central gold atom surrounded by four xenon atoms.
This compound, which exists in triclinic and tetragonal crystal modifications,[1] has the AuXe2+4 ion is stabilised by interactions with the fluoride atoms of the counterion.
[2][3] Tetraxenonogold(II) is unusual in that it is a coordination complex of xenon, which is weakly basic.
[4] Four xenon atoms bond with the gold(II) ion to make this complex.
A compound containing a mercury–xenon bond [HgXe]2+[Sb2F11]–[SbF6]– (xenonomercury(II) undecafluorodiantimonate hexafluoroantimonate) has also been isolated.