Mixed cations of sulphur in disulphuric acid

Abstract

Sulphur monochloride and dichloride form S₈²⁺ and SCl₃⁺ ions when dissolved in disulphuric acid. In the presence of halogens, sulphur dichloride forms SX₃⁺ ions while sulphur monochloride forms S₂Cl₃⁺ and S₂Br₃⁺ which disproportionate to form SX₃⁺ and sulphur. SX₃⁺ ions are formed when sulphur is dissolved in disulphuric acid containing chlorine or bromine or when halogens are added to the colourless solution of S₄²⁺ ions in disulphuric acid.