Reactions of tetrasulphur tetranitride with halides. Part V. The preparation of cyclopentathiazenium (S5N5+) salts and some observations on the structure of the cyclopentathiazenium cation
Abstract
The cyclopentathiazenium salts, S5N5+A–(A–= AlCl4–, FeCl4–, SbCl6–), are readily prepared in high yield from tetrasulphur tetranitride, trichlorocyclotrithiazene (NSCl)3, and the metal chloride: AlCl3, FeCl3, or SbCl5. Other salts can be prepared by metathesis in anhydrous formic acid. The nature of the bonding in the cation is discussed with respect to its unusual stability.