Copper(II) hexafluoroantimonate is an inorganic compound with the chemical formula . It is a white hygroscopic solid.
Structure X-ray powder diffraction suggests copper(II) hexafluoroantimonate adopts a -type structure.
Preparation Copper(II) hexafluoroantimonate can be prepared by treating copper(II) fluoride with an excess of antimony pentafluoride in anhydrous hydrogen fluoride.
The hexahydrate can be crystallized from acetone and dried over phosphorus pentoxide.
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. It also catalyzes cycloaddition and ring formation reactions.
Related compounds Copper(II) salts of other hexafluoride anions such as copper(II) hexafluororuthenate (Cu(RuF6)2) have been characterized.
Copper(I) hexafluoroantimonate Copper(I) hexafluoroantimonate forms yellow–orange, rhombohedral LiSbF6-type crystals (space group R (No. 148), a = 530.4 pm, c = 1453 pm, Z = 3). It is prepared by the reduction of copper(II) hexafluoroantimonate with copper in anhydrous hydrogen fluoride.
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