Tetraiodine nonoxide is an iodine oxide with the chemical formula I4O9.
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| Identifiers | |
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3D model (JSmol)
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| Properties | |
| I4O9 | |
| Molar mass | 651.609 g·mol−1 |
| Appearance | light yellow solid[1] |
| Melting point | 75 °C (decomposes)[1] |
| reacts | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
editTetraiodine nonoxide can be produced by reacting ozone and iodine in carbon tetrachloride at −78 °C:[2][3]
- 2 I2 + 9 O3 → I4O9 + 9 O2
It can also be produced by heating iodic acid and phosphoric acid together:[4]
- 8 HIO3 → 2 I4O9 + 4 H2O + O2
Properties
editTetraiodine nonoxide is a light yellow solid that can easily hydrolyze. It decomposes above 75 °C:[2]
- 4 I4O9 → 6 I2O5 + 2 I2 + 3 O2
Like diiodine tetroxide, tetraiodine nonoxide contains both I(III) and I(V), and disproportionate to iodate and iodide under alkaline conditions:[2]
- 3 I4O9 + 12 HO− → I− + 11 IO−3 + 6 H2O
It reacts with water to form iodic acid and iodine:[3]
- 4 I4O9 + 9 H2O → 18 HIO3 + I2
References
edit- ^ a b Perry, Dale L. (2011). Handbook of Inorganic Compounds. Boca Raton, FL. p. 500. ISBN 978-1-4398-1462-8. OCLC 759865801.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ a b c Holleman, A. F.; Nils, Wiberg; Wiberg, Egon (2019). Lehrbuch der anorganischen Chemie (in German). Berlin. p. 443. ISBN 978-3-11-083817-6. OCLC 1102802853.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ a b Garg, Ragni; Singh, Randhir (2015). Inorganic Chemistry. New Delhi: McGraw-Hill Education. ISBN 978-1-259-06285-8. OCLC 965462199.
- ^ Brauer, Georg (1963). Handbook of Preparative Inorganic Chemistry V1. Burlington: Elsevier Science. p. 331. ISBN 978-0-323-16127-5. OCLC 843200092.
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