Chemical compound
Disulfuryl fluoride is an inorganic compound of sulfur, fluorine, and oxygen with the chemical formulaS2 O5 F2 .
Autoclave heating ofsulfur trioxide andcalcium fluoride :
3SO3 + CaF2 → S2 O5 F2 + CaSO4 The compound can be produced by the reaction ofSSF2 andFOSO2 F indeuterated chloroform at −100 °C:[ 1]
2SSF2 + 4FOSO2 F → 2S2 O5 F2 + 2SOF2 + SF4 + 1⁄8 S8 It can also be produced in the reaction ofiodine pentafluoride andsulfur trioxide .[ 2]
Other methods are also known.[ 3]
Physical properties [ edit ] Pyrosulfuryl difluoride forms a colorless liquid that smokes slightly in the air. It causes severe suffocation and resemblesphosgene in its action.[ 4] [ 5]
Chemical properties [ edit ] When heated, the compound is stable to a temperature of 200 °C.
It is slowly hydrolyzed by water:
S2 O5 F2 + H2 O → 2HSO3 F It reacts with tetraethyl titanate to produce diethoxytitanium difluorosulfonate:[ 6]
Ti(OC2 H5 )4 + 2S2 O5 F2 → Ti(OC2 H5 )2 (O3 SF)2 + 2C2 H5 OSO2 F ^ Willner, H.; Mistry, F.; Aubke, F. (1 December 1992)."Selected reactions of fluorine-fluorosulfate, FOSO2F" Journal of Fluorine Chemistry .59 (3):333– 349.doi :10.1016/S0022-1139(00)80329-2 .ISSN 0022-1139 . Retrieved15 August 2025 . ^ Cernik, M. (1987)."ChemInform Abstract: Reaction of Iodine Pentafluoride with Sulfur Trioxide" ChemInform 18 (33) chin.198733027.doi :10.1002/chin.198733027 .ISSN 1522-2667 . Retrieved15 August 2025 . ^ Inorganic Syntheses, Volume 11 John Wiley & Sons . 22 September 2009. p. 151.ISBN 978-0-470-13277-7 . Retrieved16 August 2025 .^ Simons, J. H. (2 December 2012).Fluorine Chemistry V5 Elsevier . p. 70.ISBN 978-0-323-14724-8 . Retrieved16 August 2025 . ^ Ryss, Iosif Grigorʹevich (1960).The Chemistry of Fluorine and Its Inorganic Compounds . Retrieved16 August 2025 . ^ Niyogi, Debyani G.; Singh, Sukhjinder; Saini, Anju; Verma, R. D. (1 February 1994)."Reactions of fluorinated acid anhydrides with metal alkoxides" Journal of Fluorine Chemistry .66 (2):153– 158.Bibcode :1994JFluC..66..153N .doi :10.1016/0022-1139(93)03012-B .ISSN 0022-1139 . Retrieved15 August 2025 .
Salts and covalent derivatives of the
fluoride ion
PF− 6 ,AsF− 6 ,SbF− 6 compoundsAlF2− 5 ,AlF3− 6 compoundschlorides, bromides, iodides SiF2− 6 ,GeF2− 6 compoundsOxyfluorides Organofluorides with transition metal, nitric acids bifluorides thionyl, phosphoryl,
