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3D model (JSmol)
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ChemSpider | |
PubChem CID
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Properties | |
AsF6N2S | |
Molar mass | 248.99 g·mol−1 |
Appearance | yellow solid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dithionitronium hexafloroarsenate is the inorganic compound with the formula [SN2]AsF6. It is the hexafluoroarsenate (AsF−6) salt of S=N=S+. The cation is of interest as the sulfur analogue of nitronium (NO+2). Hexafloroarsenate is a weakly coordinating anion. According to X-ray crystallography, S=N=S+ is linear with S-N distances of 146 picometers.[1]
Dithionitronium hexafluoroarsenate is prepared from thiazyl chloride using silver hexafluoroarsenate.[2] The hexachloroantimonate salt can be prepared by treating thiazyl chloride with sulfur in the presence of antimony pentachloride according to this idealized equation:
The dithionitronium cation reacts with nitriles to give dithiadiazolium salts:[3]
Addition to alkynes gives dithiazolium salts: