Sulphur–nitrogen anions: formation from azide ion and elemental sulphur and their role in the synthesis of cyclic sulphur imides
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 16-17,p. 1715-1717
- https://doi.org/10.1039/dt9750001715
Abstract
The reaction of azide ion with cyclo-octasulphur in tris(dimethylamino)phosphine oxide produces the [S4N]– ion, whereas lithium nitride yields the trisulphur radical ion, S3 –·, predominantly. The azide reaction provides a convenient and direct synthesis of S7NH. PO(NMe2)3 Is superior to NN-dimethylformamide (dmf) as a solvent for the S2Cl2–NH3 route to cyclic sulphur imides. Equilibria of the type [S7N]–⇌[S4N]–+⅜S8⇌½[S6N2]2–+½S8 are invoked to explain the formation and relatively low yields of S6(NH)2 isomers in these syntheses.Keywords
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