Tetraxenonogold(II)

Tetraxenonogold(II)
Names
	IUPAC name Tetraxenonogold(II)
Identifiers
3D model (JSmol)	Interactive image;
ChemSpider	21106483;
PubChem CID	139031022;
	InChI InChI=1S/Au.4Xe/q+2;;;; Key: FIAFJDZYGVZLAJ-UHFFFAOYSA-N; InChI=1/Au.4Xe/q+2;;;;/rAuXe4/c2-1(3,4)5/q+2 Key: FIAFJDZYGVZLAJ-YSLMZIHEAX;
	SMILES [Xe+][Au-2]([Xe+])([Xe+])[Xe+];
Properties
Chemical formula	AuXe2+; 4
Molar mass	722.138
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tetraxenonogold(II), gold tetraxenide(II) or AuXe²⁺
₄ is a cationic complex with a square planar configuration of atoms. It is found in the compound AuXe²⁺
₄(Sb
₂F⁻
₁₁)
₂ (tetraxenonogold(II) undecafluorodiantimonate), which exists in triclinic and tetragonal crystal modifications.^[1] The AuXe²⁺
₄ ion is stabilised by interactions with the fluoride atoms of the counterion. The Au−Xe bond length is 274 pm (2.74 Å).^[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

^ Wai-Kee Li; Gong-Du Zhou; Thomas C. W. Mak (2008). Gong-Du Zhou; Thomas C. W. Mak (eds.). Advanced Structural Inorganic Chemistry. Oxford University Press. p. 678. ISBN 978-0-19-921694-9.
^ Li, Wai-Kee; Zhou, Gong-Du (2008). Advanced Structural Inorganic Chemistry. Thomas C. W. Mak. Oxford University Press. p. 74. ISBN 978-0-19-921694-9.
^ Mackay, Kenneth Malcolm; Mackay, Rosemary Ann; Henderson, W. (2002). Introduction to modern inorganic chemistry (6th ed.). CRC Press. p. 496. ISBN 0-7487-6420-8.
^ Konrad Seppelt, Stefan Seidel; Seppelt, K (2000-10-06). "Xenon as a Complex Ligand: The Tetraxenonogold(II) Cation in AuXe²⁺
₄(Sb
₂F⁻
₁₁)
₂". Science. 290 (5489): 117–118. Bibcode:2000Sci...290..117S. doi:10.1126/science.290.5489.117. PMID 11021792.
^ Hwang, In-Chul; Seidel, Stefan; Seppelt, Konrad (2003-09-22). "Gold( I ) and Mercury( II ) Xenon Complexes". Angewandte Chemie International Edition. 42 (36): 4392–4395. doi:10.1002/anie.200351208. ISSN 1433-7851. PMID 14502720.

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[waikeeli2-1] Wai-Kee Li; Gong-Du Zhou; Thomas C. W. Mak (2008). Gong-Du Zhou; Thomas C. W. Mak (eds.). Advanced Structural Inorganic Chemistry. Oxford University Press. p. 678. ISBN 978-0-19-921694-9.

[waikeeli-2] Li, Wai-Kee; Zhou, Gong-Du (2008). Advanced Structural Inorganic Chemistry. Thomas C. W. Mak. Oxford University Press. p. 74. ISBN 978-0-19-921694-9.

[3] Mackay, Kenneth Malcolm; Mackay, Rosemary Ann; Henderson, W. (2002). Introduction to modern inorganic chemistry (6th ed.). CRC Press. p. 496. ISBN 0-7487-6420-8.

[4] Konrad Seppelt, Stefan Seidel; Seppelt, K (2000-10-06). "Xenon as a Complex Ligand: The Tetraxenonogold(II) Cation in AuXe²⁺
₄(Sb
₂F⁻
₁₁)
₂". Science. 290 (5489): 117–118. Bibcode:2000Sci...290..117S. doi:10.1126/science.290.5489.117. PMID 11021792.

[5] Hwang, In-Chul; Seidel, Stefan; Seppelt, Konrad (2003-09-22). "Gold( I ) and Mercury( II ) Xenon Complexes". Angewandte Chemie International Edition. 42 (36): 4392–4395. doi:10.1002/anie.200351208. ISSN 1433-7851. PMID 14502720.

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