Rhenium(VII) oxide
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| Rhenium(VII) oxide | |
|---|---|
| Image:Rhenium(IV) oxide.jpg | |
| General | |
| Other names | Rhenium heptoxide |
| Molecular formula | O7Re2 |
| Molar mass | 484.410 g/mol |
| Appearance | yellow crystalline powder |
| CAS number | [1314-68-7] |
| Properties | |
| Density and phase | 6.103 g/cm3, solid |
| Solubility | Hydrolyses |
| Melting point | 360 °C |
| Boiling point | sublimes |
| Hazards | |
| EU classification | not listed |
| NFPA 704 | |
| Related | |
| Compounds | Mn2O7, Tc2O7, Perrhenic acid |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Rhenium(VII) oxide is the chemical compound with the formula Re2O7. It is the anhydride of the hypothetical acid HOReO3. Perrhenic acid however is closely related structurally to Re2O7. Re2O7 is a polymeric consisting, unusually, of the metal centers in two coordination environments - octahedral and tetrahedral. Gaseous Re2O7 is however molecular, consisting of a pair of tetrahedra that share a corner.[1]
Re2O7 is a precursor to methyl rhenium trioxide ("MTO"), a catalyst for oxidations.[2]
[edit] References
- ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
- ^ Herrmann, W. A.; Kühn, F. E., "Organorhenium Oxides", Accounts of Chemical Research, 1997, volume 30, page 169-180. DOI:10.1021/ar9601398
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