Notes. Reactions of (NSCl)3 with Lewis acids and sulphur: a convenient preparation of [S2N][SbCl6]

Abstract

Reaction of (NSCl)₃ with SbCl₅ in thionyl chloride or methylene chloride, in molar ratio 1:3, followed by the addition of three equivalents of elemental sulphur produces [S₂N][SbCl₆], [S₃N₂Cl][SbCl₆], and [NS₂Cl₂][SbCl₆]; the adduct S₄N₄·SbCl₅, was also produced in methylene chloride. The products can be separated by solvent extraction; the overall yield of [S₂N][SbCl₆] is 35%. A similar reaction in methylene chloride using FeCl₃ instead of SbCl₅ produced [S₆N₄][FeCl₄]₂.