Sodium perrhenate (also known as sodium rhenate(VII)) is the inorganic compound with the formula NaReO4. It is a white salt that is soluble in water. It is a common precursor to other rhenium compounds. Its structure resembles that of sodium perchlorate and sodium permanganate.
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| Names | |
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| Other names Sodium rhenate(VII) | |
| Identifiers | |
3D model (JSmol) | |
| ChEMBL | |
| ECHA InfoCard | 100.033.388 |
PubChem CID | |
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| UNII | |
CompTox Dashboard (EPA) | |
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| Properties | |
| NaReO4 | |
| Molar mass | 273.1866 g/mol |
| Appearance | white solid |
| Density | 5.39 g/cm3 |
| Melting point | 414 °C (777 °F; 687 K) |
| 103.3 g/100 mL (0 °C) 114.0 g/100 mL (25 °C)[1] 145.3 g/100 mL (30 °C) 173.0 g/100 mL (50 °C) | |
| Solubility | soluble in water (> 1130 g/L at 25 °C)[1] |
| Structure | |
| tetragonal | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards | Oxidizer, skin/eyes irritation |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Preparation
It can be prepared by treatment of rhenium heptoxide with base or by ion exchange from the potassium salt.[2]
Sodium perrhenate can be prepared from rhenium metal with hydrogen peroxide in the presence of base.[3]
Reactions
It reacts with sodium in ethanol to give nonahydridorhenate.[2]
Sodium perrhenate has been used as a precursor of rhenium nitrides (such as Re3N, Re2N, Re3N2, ReN2, ReN3, ReN4), which can be used as catalysts for ammonia synthesis and for hydro-denitrogenation.[4]
References
Further reading
- Ahluwalia, J. C.; Cobble, J. W. (1 December 1964). "The Thermodynamic Properties of High Temperature Aqueous Solutions. II. Standard Partial Molal Heat Capacities of Sodium Perrhenate and Perrhenic Acid from 0 to 100o". Journal of the American Chemical Society. 86 (24): 5377–5381. doi:10.1021/ja01078a001.
- Dwek, Raymond A.; Luz, Z.; Shporer, M. (1 May 1970). "Nuclear magnetic resonance of aqueous solutions of sodium perrhenate". The Journal of Physical Chemistry. 74 (10): 2232–2233. doi:10.1021/j100909a038.