1,3-Difluoro-trisulfane-1,1-difluoride

1,3-Difluoro-trisulfane-1,1-difluoride
Names
	IUPAC name (Trifluoro-λ4-sulfanyl)sulfanyl thiohypofluorite
Identifiers
CAS Number	93440-84-7;
3D model (JSmol)	Interactive image;
PubChem CID	145268;
CompTox Dashboard (EPA)	DTXSID80239432 ;
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Properties
Chemical formula	F4S3
Molar mass	172.17 g·mol−1
Melting point	−62 °C (−80 °F; 211 K)
Boiling point	94 °C (201 °F; 367 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

1,3-Difluoro-trisulfane-1,1-difluoride is an inorganic molecular substance with the structure SF₃SSF, consisting of sulfur in a low oxidation state with fluorine. The compound consists of a chain of three sulfur atoms, with three fluorine atoms bonded to the sulfur on one end and the fourth fluorine bonded to the sulfur on the other end. It has a melting point of -62 °C and a boiling point of 94 °C. As a gas, it is unstable and breaks up to form SSF₂ and SF₄.^[1]

SF₃SSF is produced by the condensation of sulfur difluoride and an isomer of SSF₂.^[2] The reaction S₃F₄ ⇌ SSF₂ + SF₂ uses 6 kJ/mol.^[3]

Possible isomers of its S₃F₄ molecular formula include FSSF₂SF, which has a spontaneous fluorine migration to yield F₂SSSF₂, which in turn spontaneously fragments to give SF₂ and SSF₂.^[4]

References

^ Willner, Helge (July 1984). "Chalkogenfluoride in niedrigen Oxydationsstufen. IX. Darstellung und Charakterisierung von SF3SSF" [Chalcogen fluorides in lower degrees of oxidation. IX. Preparation and characterization of 1,3-difluorotrisulfane 1,1-difluoride (SF₃SSF)]. Zeitschrift für anorganische und allgemeine Chemie. 514 (7): 171–178. doi:10.1002/zaac.19845140721.
^ Berry, F. J. (1984). "Chapter 6. O, S, Se, Te". Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem. 81: 145. doi:10.1039/IC9848100137.
^ Lösking, O.; Willner, H.; Baumgärtel, H.; Jochims, H. W.; Rühl, E. (November 1985). "Chalkogenfluoride in niedrigen Oxydationsstufen. X Thermochemische Daten und Photoionisations-Massenspektren von SSF₂, FSSF, SF₃SF und SF₃SSF". Zeitschrift für anorganische und allgemeine Chemie. 530 (11): 169–177. doi:10.1002/zaac.19855301120.
^ Jug, Karl; Iffert, Rüdiger (April 1989). "SINDO1 study of sulphur isomers and sulphur fluorine compounds". Journal of Molecular Structure: THEOCHEM. 186: 347–359. doi:10.1016/0166-1280(89)87055-1.

[1] Willner, Helge (July 1984). "Chalkogenfluoride in niedrigen Oxydationsstufen. IX. Darstellung und Charakterisierung von SF3SSF" [Chalcogen fluorides in lower degrees of oxidation. IX. Preparation and characterization of 1,3-difluorotrisulfane 1,1-difluoride (SF₃SSF)]. Zeitschrift für anorganische und allgemeine Chemie. 514 (7): 171–178. doi:10.1002/zaac.19845140721.

[2] Berry, F. J. (1984). "Chapter 6. O, S, Se, Te". Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem. 81: 145. doi:10.1039/IC9848100137.

[3] Lösking, O.; Willner, H.; Baumgärtel, H.; Jochims, H. W.; Rühl, E. (November 1985). "Chalkogenfluoride in niedrigen Oxydationsstufen. X Thermochemische Daten und Photoionisations-Massenspektren von SSF₂, FSSF, SF₃SF und SF₃SSF". Zeitschrift für anorganische und allgemeine Chemie. 530 (11): 169–177. doi:10.1002/zaac.19855301120.

[4] Jug, Karl; Iffert, Rüdiger (April 1989). "SINDO1 study of sulphur isomers and sulphur fluorine compounds". Journal of Molecular Structure: THEOCHEM. 186: 347–359. doi:10.1016/0166-1280(89)87055-1.

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