High oxidation state fluoro–rhenium species: preparation and characterization of [ReF6]+, [ReF4O]+, and [Re2F9O2]+, and the crystal structure of [Re2F9O2]+[Sb2F11]–

Abstract

The fluoride ion donor properties of ReF₇ and ReF₅O have been demonstrated by the preparation of the adducts [ReF₆]⁺[Sb₃F₁₆]^–, [ReF₆]⁺[Sb₃F₁₆]^–, [ReF₄O]⁺[AsF₆]^–, and [Re₂F₉O₂]⁺[Sb₂F₁₁]^–, which have been characterized by vibrational spectroscopy, mass spectrometry, and chemical analysis. The crystal structure of [Re₂F₉O₂]⁺[Sb₂F₁₁]^– consists of discrete fluorine-bridged dimeric anions, both of which consist of two bridged octahedra.