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Triiodine fluorosulfate

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Triiodine fluorosulfate
Names

Other names Iodine fluorosulfate iodide Triiodine fluorosulfonate
Identifiers
CAS Number	13537-36-5
3D model (JSmol)	Interactive image
InChI InChI=1S/FHO3S.I3/c1-5(2,3)4;1-3-2/h(H,2,3,4);/q;+1/p-1 Key: GBXBCNLVCWGHPO-UHFFFAOYSA-M
SMILES O=S(=O)([O-])F.I[I+]I
Properties
Chemical formula	FI₃O₃S
Molar mass	479.77 g·mol⁻¹
Appearance	brown solid
Density	1.7844 g/cm³
Melting point	92 °C (198 °F; 365 K)^[1]
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

Triiodine fluorosulfate is aninorganic compound of iodine, fluorine, oxygen, and sulfur with the chemical formulaI₃SO₃F.

Triiodine fluorosulfonate is obtained from iodine andiodine(I) fluorosulfonate at 85 °C.^[2]

I₂ + ISO₃F → I₃SO₃F

Also, a reaction of iodine withperoxydisulfuryl difluoride:^[3]^[4]

3I₂ + S₂O₆F₂ → 2I₃SO₃F

The compound hydrolyzes well in water and dissolves insulfuric acid.

It reacts withtetrafluoroethylene (C₂F₄) to formICF₂CF₂O₃SF andI₂.^[5]

^Williamson, Stanley M. (1966).Recent Progress in Sulfur-Fluorine Chemistry. Progress in Inorganic Chemistry. Vol. 7. John Wiley & Sons, Ltd. pp. 39–81.doi:10.1002/9780470166086.ch2.ISBN 978-0-470-17675-7.
^Aubke, Friedhelm; Cady, George H. (1 March 1965)."Iodine Fluorosulfates".Inorganic Chemistry.4 (3):269–273.doi:10.1021/ic50025a001.ISSN 0020-1669. Retrieved18 August 2025.
^U.S. Government Research Reports. U.S. Department of Commerce, Office of Technical Services. 1964. p. 24. Retrieved18 August 2025.
^Macintyre, Jane E. (23 July 1992).Dictionary of Inorganic Compounds.CRC Press. p. 3131.ISBN 978-0-412-30120-9. Retrieved18 August 2025.
^Fokin, A. V.; Studnev, Yu. N.; Rapkin, A. I.; Tatarinov, A. S. (1 August 1983). "Reaction of iodine fluosulfate and tris(fluosulfate) with haloalkanes".Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science.32 (8):1700–1702.doi:10.1007/BF00954296.ISSN 1573-9171.

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