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| Names | |
|---|---|
| IUPAC name Rhenium(IV) oxide | |
| Other names Rhenium dioxide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.031.659 |
| EC Number |
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| Properties | |
| ReO2 | |
| Molar mass | 218.206 g/mol |
| Appearance | grayorthorhombic crystals |
| Density | 11.4 g/cm3[1] |
| Melting point | decomposes at 1000 °C[2] |
| insoluble | |
| Solubility in alkali | insoluble |
| +44.0·10−6 cm3/mol | |
| Structure | |
| Orthorohmbic,oP12 | |
| Pbcn, No. 60 | |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Safety data sheet (SDS) | Aldrich MSDS |
| Related compounds | |
Otheranions | Rhenium(VII) oxide Rhenium(III) oxide Rhenium(III) chloride |
Othercations | manganese(IV) oxide Technetium(IV) oxide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Rhenium(IV) oxide orrhenium dioxide is theinorganic compound with theformulaReO2. This gray to black crystallinesolid is a laboratory reagent that can be used as acatalyst. It adopts therutile structure.
It forms viacomproportionation:[3]
Single crystals are obtained bychemical transport, usingiodine as the transporting agent.:[4]
At high temperatures it undergoesdisproportionation:
It formsrhenates with alkalinehydrogen peroxide andoxidizing acids.[5] In molten sodium hydroxide it forms sodium rhenate:[6]
