The synthesis, characterization, X-ray crystal structure and solution ESR spectrum of the paramagnetic solid, 4,5-bis(trifluoromethyl)-1,2,3-trithiolium hexafluorarsenate: implications for the identity of ‘1,2-dithiete’ cations

Abstract

The 7π radical CF₃[graphic omitted]CF₃^+˙1, which is the first isolated example of a R[graphic omitted]R^+˙ cation, is prepared by the reaction of S₈(AsF₆)₂, S₄(AsF₆)₂, AsF₅ and CF₃CCCF₃ in SO₂; the X-ray crystal structure consists of planes containing both monomeric radical cations and anions, the solid exhibiting Curie–Weiss paramagnetism between 25 and 200 K (µ= 1.68 µ_B).