Synthesis and properties of chromium(V) trifluoride oxide CrOF3 and related oxo-anions

Abstract

Chromium trifluoride oxide has been prepared from CrO₃ and BrF₃, followed by cautious fluorination. It has been characterised by elemental analysis, i.r., u.v.–visible, e.s.r. spectroscopy, and magnetic susceptibility, and a number of its properties are described. The compound CsCrOF₄ has been prepared from Cs₂Cr₂O₇ and BrF₃ and similarly characterised, but attempts to isolate salts containing the [CrOF₅]^2– ion by a variety of methods were unsuccessful.