Action du Brome sur S₄N₄

Abstract

S₄N₄ reacts with Br₂ in CS₂ or CCl₄ to give several compounds: S₄N₃Br, S₄N₃Br₃, S₃N₂ Br₂ and (SNBr_0,33)_x. The thiazyl bromides are insoluble in non polar solvents. The composition of the precipitate depends on the concentration of Br₂ and on the reaction temperature: at the boiling temperature of the solution only pure S₄N₃ Br₃ is obtained, at room temperature, a mixture of the three compounds is formed, S₃N₂Br₂ is always produced with S₄N₃Br and S₄N₃Br₃. S₄N₃Br₃ can be obtained also by the reaction of S₄N₃Cl and CsBr₃ dissolved in polar anhydrous solvents.

The characterization and separation of the above bromides are described.