The thiotrithiazyl cation

The thiotrithiazyl cation in [S4N3]C1 was one of the first S-N heterocycles to be prepared and structurally characterized. It is obtained as a reasonably air-stable, yellow solid by the reaction of S4N4 or [SsNaClJCl with S2CI2 in CCI4 (Eq. 5.12).  

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Thiotrithiazyl chloride explodes when heated. Tetrasulfur tetranitride reacts with NOC1 in the following way to yield a product that contains the S3N2C1+ cation ... 

The dry chloride, which explodes on heating in air, will rapidly absorb ammonia gas and then explode [1]. The structure of the cation is now known to be a 7-membered ring with only 2 adjacent sulfur atoms. Thiotrithiazyl salts other than the chloride are also explosive [2],... 

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