Diphosphorus tetroxide
| Names | |
|---|---|
| Other names
Phosphorus tetroxide Phosphorus(V) oxide Phosphoric anhydride | |
| Identifiers | |
12137-38-1  | |
| Properties | |
| P2O4 | |
| Molar mass | 125.96 g·mol−1 |
| Appearance | Solid |
| Melting point | >100 °C |
| Vapor pressure | 2.54 g·cm−3 |
| Hazards | |
| EU classification (DSD) |
not listed |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Diphosphorus tetroxide, or phosphorus tetroxide is an inorganic compound of phosphorus and oxygen. It has the empirical chemical formula P
2O
4. Solid diphosphorus tetroxide (also referred to as phosphorus(III,V)-oxide) consists of variable mixtures of the mixed-valence oxides P4O7, P4O8 and P4O9[1][2][3]
Preparation
Phosphorus tetroxide is obtainable by thermal decomposition of phosphorus trioxide:
- Phosphorus trioxide disproportionation over the half on the 210°C to phosphorus and phosphorus tetroxide.
In addition, phosphorus trioxide by controlled oxidation with oxygen in carbon tetrachloride solution, into phosphorus tetroxide can be converted.[4][5][6]
Reduction of phosphorus produces the phosphorus tetroxide, in careful reaction with red phosphorus, at 450-525 °C.
References
- ↑ http://www.wiley.com/college/math/chem/cg/sales/voet.html.
- ↑ Alberts B.; et al. (2002). Molecular Biology of the Cell, 4th Ed. Garland Science. ISBN 0-8153-4072-9.
- ↑ Voet D., Voet J. G. Biochemistry, 3rd Ed. Wiley. ISBN 978-0-471-19350-0.
- ↑ Atkins P., de Paula J. (2006). Physical chemistry, 8th Ed. San Francisco: W. H. Freeman. ISBN 0-7167-8759-8.
- ↑ Petrucci R. H., Harwood W. S., Herring F. G. (2002). General Chemistry, 8th Ed. New York: Prentice-Hall. ISBN 0-13-014329-4.
- ↑ Laidler K. J. (1978). Physical chemistry with biological applications. Benjamin/Cummings. Menlo Park. ISBN 0-8053-5680-0.
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