Rhenium hexafluoride
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| Names | |
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IUPAC name
rhenium(VI) fluoride
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| Other names
rhenium hexafluoride
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| Identifiers | |
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3D model (JSmol)
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| ECHA InfoCard | 100.030.144 |
| EC Number | 233-172-2 |
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PubChem CID
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| UNII | |
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| Properties | |
| F6Re | |
| Molar mass | 300.20 g/mol |
| Appearance | liquid, or yellow crystalline solid |
| Density | 4.94g/mL |
| Melting point | 18.5 °C (65.3 °F; 291.6 K) |
| Boiling point | 33.7 °C (92.7 °F; 306.8 K) |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Rhenium hexafluoride, also rhenium(VI) fluoride, (ReF6) is a compound of rhenium and fluorine and one of the seventeen known binary hexafluorides.
Rhenium hexafluoride is made by combining rhenium heptafluoride with additional rhenium metal at 300 °C in a pressure vessel.
Rhenium hexafluoride is a liquid at room temperature. At 18.5 °C, it freezes into a yellow solid. The boiling point is 33.7 °C.
The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.417 Å, b = 8.570 Å, and c = 4.965 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 4.94 g·cm−3.
The ReF6 molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group (Oh). The Re–F bond length is 1.823 Å.
Rhenium hexafluoride is a commercial material used in the electronics industry for depositing films of rhenium.
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