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Dithionitronium hexafluoroarsenate

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(Redirected from Dithionitronium hexachloroantimonate)
Dithionitronium hexafluoroarsenate
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
PubChem CID
InChI
  • InChI=1S/AsF6.NS2/c2-1(3,4,5,6)7;2-1-3/q-1;+1Key: FHQHPTGLQAUWCS-UHFFFAOYSA-N
SMILES
  • (=S)=S.F(F)(F)(F)(F)F
Properties
Chemical formula AsF6N2S
Molar mass 248.99 g·mol
Appearance yellow solid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

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.

Synthesis and reactions

Dithionitronium hexafluoroarsenate is prepared from thiazyl chloride using silver hexafluoroarsenate. The hexachloroantimonate salt can be prepared by treating thiazyl chloride with sulfur in the presence of antimony pentachloride according to this idealized equation:

SNCl + S + SbCl5 → [NS2]SbCl6

The dithionitronium cation reacts with nitriles to give dithiadiazolium salts:

[NS2] + RCN → [RCN2S2]

Addition to alkynes gives dithiazolium salts:

[NS2] + R2C2 → [(RC)2NS2]

References

  1. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. Ayres, Bryan; Banister, Arthur J.; Coates, Philip D.; Hansford, Michael I.; Rawson, Jeremy M.; Rickard, Clifton E. F.; Hursthouse, Michael B.; Malik, K. M. Abdul; Motevalli, Majid (1992). "A General Route to N(SCl) and SNS Salts". Journal of the Chemical Society, Dalton Transactions (21): 3097. doi:10.1039/DT9920003097.
  3. Rawson, Jeremy M.; Banister, Arthur J.; Lavender, Ian (1995). "The Chemistry of Dithiadiazolylium and Dithiadiazolyl Rings". Adv. Heterocyc. Chem. 62. doi:10.1016/S0065-2725(08)60422-5.
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