Thiazyl trifluoride

Thiazyl trifluoride

Identifiers
CAS Number	15930-75-3
3D model (Jmol)	Interactive image
ChEBI	CHEBI:30507
ChemSpider	123471
PubChem	140008
InChI InChI=1S/F3NS/c1-5(2,3)4 Key: UQUPGRNSXINWBS-UHFFFAOYSA-N InChI=1/F3NS/c1-5(2,3)4 Key: UQUPGRNSXINWBS-UHFFFAOYAR
SMILES FS(F)(F)#N
Properties
Chemical formula	NSF3
Molar mass	103.07 g mol^−1
Melting point	−72.6 °C (−98.7 °F; 200.6 K)
Boiling point	−27.1 °C (−16.8 °F; 246.1 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Thiazyl trifluoride is a chemical compound of nitrogen, sulfur, and fluorine, having the formula NSF₃. It exists as a stable, colourless gas, and is an important precursor to other sulfur-nitrogen-fluorine compounds.^[1] It has tetrahedral molecular geometry around the sulfur atom, and is regarded to be a prime example of a compound that has a sulfur-nitrogen triple bond.^[2]

Preparation

NSF₃ can be synthesised by the fluorination of thiazyl fluoride, NSF, with silver(II) fluoride, AgF₂:

NSF + 2 AgF₂ → NSF₃ + 2 AgF

or by the oxidative decomposition of FC(O)NSF₂ by silver(II) fluoride.:^[3]

FC(O)NSF₂ + 2 AgF₂ → NSF₃ + 2 AgF + COF₂

It is also a product of the oxidation of ammonia by S
2F
10.^[4]

Reactions

NSF₃ reacts with carbonyl fluoride (COF₂) in the presence of hydrogen fluoride to form pentafluorosulfanyl isocyanate (SF₅NCO).^[5]

References

1. Oskar Glemser and Rüdiger Mews (1980). "Chemistry of Thiazyl Fluoride (NSF) and Thiazyl Trifluoride (NSF₃): A Quarter Century of Sulfur-Nitrogen-Fluorine Chemistry". Angew. Chem. Int. Ed. Engl. 19 (11): 883–899. doi:10.1002/anie.198008831.
2. Borrmann, T.; Lork, E.; Mews, R. D.; Parsons, S.; Petersen, J.; Stohrer, W. D.; Watson, P. G. (2008). "The crystal structures of NSF
   3 and (NSF
   2N(CH
   3)CH–)
   2: How short is the 'Crystallographic' N≡S triple bond?". Inorganica Chimica Acta. 361 (2): 479–486. doi:10.1016/j.ica.2007.05.016.
3. Chivers, Tristram; Laitinen, Risto S. (2006). "Chalcogen–Nitrogen Chemistry". In Devillanova, Francesco. Handbook of Chalcogen Chemistry. London: The Royal Society of Chemistry. p. 238. doi:10.1039/9781847557575. ISBN 978-0-85404-366-8.
4. Steve Mitchell (1996). Steve Mitchell, ed. Biological interactions of sulfur compounds. CRC Press. p. 14. ISBN 0-7484-0245-4.
5. US patent 3,666,784, Alan F. Clifford, Thomas C. Rhyne and James W. Thompson, "Process For Preparing .alpha.,.alpha.-Fluorinated Alkyl Isocyanates", issued 1972-05-30