Tetraiodine nonoxide
Chemical compound From Wikipedia, the free encyclopedia
Tetraiodine nonoxide is an iodine oxide with the chemical formula I4O9.
| |
| Identifiers | |
|---|---|
3D model (JSmol) |
|
| |
| |
| 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).
| |
Preparation
Tetraiodine 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
Tetraiodine 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
Wikiwand - on
Seamless Wikipedia browsing. On steroids.