Rhenium(VII) oxide
Template:Chembox Other
| Names | |
|---|---|
| Other names
Rhenium heptoxide
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| Identifiers | |
| ECHA InfoCard | 100.013.857 |
CompTox Dashboard (EPA)
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| Properties | |
| O7Re2 | |
| Molar mass | 484.410 g/mol |
| Appearance | yellow crystalline powder |
| Density | 6.103 g/cm3, solid |
| Melting point | 360 °C |
| Boiling point | sublimes |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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, Re2O7·2H2O, however is closely related structurally to Re2O7. Solid Re2O7 is polymeric consisting, unusually, of the metal centers in two coordination environments - octahedral and tetrahedral. Gaseous Re2O7 is however molecular, consisting of a pair of ReO4 tetrahedra that share a vertex.[1]
Re2O7 is a precursor to methylrhenium trioxide ("MTO"), a catalyst for oxidations.[2]
References
- ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
- ^ W. A. Herrmann and F. E. Kuhn (1997). "Organorhenium Oxides". Acc. Chem. Res. 30 (4): 169–180. doi:10.1021/ar9601398.
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