Reactions of tetrasulphur tetranitride with halides. Part IV. The formation of cyclopentathiazenium salts in thionyl chloride

Abstract

Tetrasulphur tetranitride reacts with thionyl chloride in the presence of ferric or aluminium chloride to give a mixture of the tetrachlorometallates (MCl₄^–, M = Fe or Al) of the cations S₃N₂Cl⁺, S₄N₃⁺, and the new species S₅N₅⁺; their i.r. spectra are discussed. These three cations appear to be members of a potentially large class of inorganic aromatic SN species.