Fluoroantimonate

The fluoroantimonates are a family of polyatomic weakly coordinating anions composed of antimony and fluorine, consisting of the fluorine adducts of antimony pentafluoride, [(SbF5)nF]. They occur in the internal chemistry of fluoroantimonic acid.

The most notable fluoroantimonates are hexafluoroantimonate [SbF6] and undecafluorodiantimonate [Sb2F11]. Both are used as components of ionic liquids and as weakly coordinating anions in the study of highly reactive cations.