Copper(II) hexafluoroantimonate
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| Properties | |
| Cu(SbF6)2 | |
| Molar mass | 535.047 g·mol−1 |
| Appearance | white solid[1] |
| Melting point | 210 °C (410 °F; 483 K)[1] (decomposes) |
| Related compounds | |
Other cations |
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Related compounds |
Fluoroantimonic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Copper(II) hexafluoroantimonate is an inorganic compound with the chemical formula Cu(SbF6)2. It is a white hygroscopic solid.[1]
Structure
X-ray powder diffraction suggests copper(II) hexafluoroantimonate adopts a Ni(SbF6)2-type structure.[2]
Preparation
Copper(II) hexafluoroantimonate can be prepared by treating copper(II) fluoride with an excess of antimony pentafluoride in anhydrous hydrogen fluoride.[2]
The hexahydrate can be crystallized from acetone and dried over phosphorus pentoxide.[1]
Use
Copper(II) hexafluoroantimonate and related complexes can be used as catalysts in enantioselective conjugate additions, epoxidations, Diels-Alder reactions, asymmetric Henry reactions, and Mukaiyama-Michael reactions.[1] It also catalyzes cycloaddition and ring formation reactions.[3]
Related compounds
Copper(II) salts of other hexafluoride anions such as copper(II) hexafluororuthenate (Cu(RuF6)2) have been characterized.[4]
Copper(I) hexafluoroantimonate
Copper(I) hexafluoroantimonate forms yellow–orange, rhombohedral LiSbF6-type crystals (space group R3 (No. 148), a = 530.4 pm, c = 1453 pm, Z = 3).[5] It is prepared by the reduction of copper(II) hexafluoroantimonate with copper in anhydrous hydrogen fluoride.[5]
References
- 1 2 3 4 5 Chang, Shuh-Kuen; Selvaraj, Peter (2005-10-15), "Copper(II) Hexafluoroantimonate", in John Wiley & Sons, Ltd (ed.), Encyclopedia of Reagents for Organic Synthesis, Chichester, UK: John Wiley & Sons, Ltd, doi:10.1002/047084289X.rn00567, ISBN 978-0-471-93623-7
- 1 2 Mazej, Zoran (Nov 2004). "Recent achievements in the synthesis and characterization of metal hexafluorantimonates and hexafluoroaurates". Journal of Fluorine Chemistry. 125 (11): 1723–1733. doi:10.1016/j.jfluchem.2004.09.008.
- ↑ Fieser, Louis F.; Fieser, Mary; Ho, Tse‐Lok (2006-12-15). Fieser and Fieser's Reagents for Organic Synthesis (1 ed.). Wiley. doi:10.1002/9780471264194.fos11727.pub2. ISBN 978-0-471-75046-8.
- ↑ Mržljak, Tomaž; Goreshnik, Evgeny; Tavčar, Gašper; Tramšek, Melita (2025-08-29). "Coordination Chemistry of Copper and Nickel with Xenon Difluoride and the Hexafluororuthenate(V) Anion: Synthesis and Structural Studies". European Journal of Inorganic Chemistry. 28 (24). doi:10.1002/ejic.202500275. ISSN 1434-1948.
- 1 2 Mazej, Zoran; Benkič, Primož (2005-05-01). "Copper(I) hexafluoroantimonate – an example of a compound with CuI in a solely fluorine environment". Journal of Fluorine Chemistry. 126 (5): 803–808. doi:10.1016/j.jfluchem.2005.03.004. ISSN 0022-1139.