Thiazyl trifluoride

Thiazyl trifluoride
Identifiers
CAS Number	15930-75-3 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:30507 ;
ChemSpider	123471 ;
PubChem CID	140008;
CompTox Dashboard (EPA)	DTXSID30166628 ;
	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)
Structure
Molecular shape	tetrahedron
Hybridisation	sp3
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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

^ 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.
^ 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 (NSF₂N(CH₃)CH₂–)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.
^ Chivers, Tristram; Laitinen, Risto S. (2006). "Chalcogen–Nitrogen Chemistry". In Devillanova, Francesco (ed.). Handbook of Chalcogen Chemistry. London: The Royal Society of Chemistry. p. 238. doi:10.1039/9781847557575. ISBN 978-0-85404-366-8.
^ Steve Mitchell (1996). Steve Mitchell (ed.). Biological interactions of sulfur compounds. CRC Press. p. 14. ISBN 0-7484-0245-4.
^ 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

[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 (NSF₂N(CH₃)CH₂–)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 (ed.). 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

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