Diiodosyl sulfate
| Names | |
|---|---|
| Other names
Iodosyl sulfate
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| Identifiers | |
3D model (JSmol)
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| Properties | |
| (IO)2SO4 | |
| Molar mass | 381.87 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Diiodosyl sulfate is an inorganic compound, a basic salt of iodine and sulfuric acid with the formula (IO)2SO4. It forms yellow crystals.[1]
Synthesis
[edit]Reaction of iodic and sulfuric acids :
- 2 HIO3 + H2SO4 → (IO)2SO4 + O2 + 2 H2O
Passing ozonized oxygen through a solution of iodine in sulfuric acid:
- I2 + 3 O3 + H2SO4 → (IO)2SO4 + 3 O2 + H2O
Physical properties
[edit]Diiodosyl sulfate forms yellow hygroscopic crystals and is poorly soluble in cold water.[2]
It dissolves in and can be recrystallized from concentrated sulfuric acid.
Chemical properties
[edit]Under the influence of atmospheric moisture, diiodosyl sulfate hydrolyzes with the release of iodine, iodic and sulfuric acids.
It decomposes when heated:[3]
- 4(IO) 2 SO 4 → 2I2O5 + 2I2 + 4SO3 + O2
It reacts with sulfur(VI) oxide:[4]
- (IO)2SO4 + 2SO3 → I2(SO4)3
With concentrated sulfuric acid, it forms an acidic salt:
- (IO)2SO4 + H2SO4 → 2 IOHSO4
References
[edit]- ^ Gillespie, R. J.; Senior, J. B. (July 5, 1964). "Cations and Oxy Cations of Iodine. II. Solutions of Iodosyl Sulfate, Iodine Dioxide, and Iodic Acid-Iodine Mixtures in Sulfuric Acid and Dilute Oleum". Inorganic Chemistry. 3 (7): 972–977. doi:10.1021/ic50017a010 – via CrossRef.
- ^ "Chemistry of inorganic sulfonates and sulfates of polyvalent iodine". Russian Chemical Reviews 66. 1997.
- ^ Dasent, W. E.; Waddington, T. C. (January 1, 1960). "670. Iodine oxygen compounds. Part II. Iodosyl and related compounds". Journal of the Chemical Society (Resumed): 3350–3356. doi:10.1039/JR9600003350 – via pubs.rsc.org.
- ^ Argument, Cyril (1944). "The iodous sulphates". Durham theses. Durham University. p. 22.