9349. Thionyl Fluoride

Nomenclature

CAS number: 7783-42-8
Thionyl difluoride.
F2OS; mol wt 86.06.
F 44.15%, O 18.59%, S 37.26%.
SOF2.

Description and references

Usually prepd by the action of antimony trifluoride on thionyl chloride in the presence of antimony pentafluoride: Booth, Mericola, J. Am. Chem. Soc. 62, 640 (1940); Smith, Muetterties, Inorg. Synth. 6, 162 (1960). May also be prepared by the action of other fluorides on thionyl chloride: Kemmitt, Sharp, Adv. Fluorine Chem. 4, 228-229 (1965).

Properties

Colorless gas. Suffocating odor. Does not attack glass. Stored in compressed form in steel cylinders. mp 129.5°. bp 43.8°. Crit temp +88°. d (liq; 100°) 1.780. d (solid; 183°) 2.095. Trouton constant 22.6. Very slowly hydrolyzed by cold water. Sol in ether, benzene.

Caution

Highly irritating to eyes, respiratory tract.