Thiothionyl fluoride

Structural formula
General
Surname	Thiothionyl fluoride
other names	Disulfur difluoride
Molecular formula	F 2 S 2
Brief description	colorless gas
External identifiers / databases
CAS number 101947-30-2 PubChem 145375 Wikidata Q15632803
properties
Molar mass	102.12 g mol −1
Physical state	gaseous
Melting point	−164.6 ° C
boiling point	−10.6 ° C
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thiothionyl fluoride is a chemical compound between fluorine and sulfur and is isomeric to difluorodisulfane .

Extraction and presentation

Thiothionyl fluoride can be obtained by reacting disulfur dichloride with potassium fluoride at around 150 ° C or mercury (II) fluoride at 20 ° C.

${\displaystyle \mathrm {S_{2}Cl_{2}+2\ KF\longrightarrow SSF_{2}+2\ KCl} }$

It is also possible to display it by reacting nitrogen trifluoride with sulfur.

${\displaystyle \mathrm {NF_{3}+3\ S\longrightarrow S_{2}F_{2}+NSF} }$

It is also formed from difluorodisulfane when it comes into contact with alkali fluorides.

properties

Thiothionyl fluoride is a colorless gas. It converts into sulfur tetrafluoride and sulfur at higher temperatures and pressures .

${\displaystyle \mathrm {2\ S_{2}F_{2}\ \longrightarrow SF_{4}+3\ S} }$

With hydrogen fluoride , it is converted to sulfur tetrafluoride and hydrogen sulfide .

${\displaystyle \mathrm {SSF_{2}+2\ HF\ \longrightarrow SF_{4}+H_{2}S} }$

Individual evidence

1. ^ ^{A b c d} A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 379.
2. ↑ ^{a b c d e} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 182.
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
4. ↑ Ralf Steudel : Chemistry of Non-Metals: From Structure and Bond to Application . Walter de Gruyter, 2008, ISBN 3-11-021128-9 , p. 475 ( limited preview in Google Book search).
5. ↑ Lothar Kolditz : Inorganische Chemie , Deutscher Verlag der Wissenschaften, Berlin 1983, p. 468.