-fluoride.svg) | |
| Names | |
|---|---|
| IUPAC name rhenium(VI) fluoride | |
| Other names rhenium hexafluoride | |
| Identifiers | |
3D model (JSmol) | |
| ECHA InfoCard | 100.030.144 |
| EC Number |
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| UNII | |
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| Properties | |
| F6Re | |
| Molar mass | 300.20 g/mol |
| Appearance | liquid, or yellow crystalline solid[1] |
| Density | 4.94g/mL[2] |
| Melting point | 18.5 °C (65.3 °F; 291.6 K)[1] |
| Boiling point | 33.7 °C (92.7 °F; 306.8 K)[1] |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Rhenium hexafluoride, alsorhenium(VI) fluoride, (ReF6) is a compound ofrhenium andfluorine and one of the seventeen known binaryhexafluorides.
Rhenium hexafluoride is made by combiningrhenium heptafluoride with additional rhenium metal at 300 °C in apressure vessel.[2]
The compound is a Lewis acid and strong oxidant, adductingpotassium fluoride and oxidizingnitric oxide to nitrosyl:[3]
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.[1]
The solid structure measured at −140 °C isorthorhombic space groupPnma.Lattice parameters area = 9.417 Å,b = 8.570 Å, andc = 4.965 Å. There are fourformula units (in this case, discrete molecules) perunit cell, giving a density of 4.94 g·cm−3.[2]
The ReF6 molecule itself (the form important for the liquid or gas phase) hasoctahedral molecular geometry, which has point group (Oh). The Re–Fbond length is 1.823 Å.[2]
Rhenium hexafluoride is a commercial material used in the electronics industry fordepositing films of rhenium.[3]
