Tetraxenonogold(II)
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Tetraxenonogold(II)
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3D model (JSmol)
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| Properties | |
| AuXe2+4 | |
| Molar mass | 722.137 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Tetraxenonogold(II), gold tetraxenide(II) or AuXe2+4 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 AuXe2+4(Sb2F−11)2 (tetraxenonogold(II) undecafluorodiantimonate). 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. The Au−Xe bond length is 274 pm (2.74 Å).[1]: 74 [2] 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 gold(III) fluoride (AuF3) by xenon in the presence of fluoroantimonic acid. The salt crystallises at low temperature.[3]
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.[4]
References
- ^ a b Wai-Kee Li (2008). Gong-Du Zhou; Thomas C. W. Mak (eds.). Advanced Structural Inorganic Chemistry. Oxford University Press. p. 678. 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.
- ^ Seidel, Stefan; Seppelt, Konrad (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.