Rhodium (VI) fluoride
Structural formula | ||||||||||
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General | ||||||||||
Surname | Rhodium (VI) fluoride | |||||||||
other names |
Rhodium hexafluoride |
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Molecular formula | RhF 6 | |||||||||
Brief description |
black crystalline solid |
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properties | ||||||||||
Molar mass | 216.91 g mol −1 | |||||||||
Physical state |
firmly |
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density |
3.71 g cm −3 (−140 ° C) |
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Melting point |
≈ 70 ° C |
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safety instructions | ||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Rhodium (VI) fluoride (RhF 6 ), often also rhodium hexafluoride , is a chemical compound of the elements rhodium and fluorine and belongs to the group of hexafluorides .
presentation
Rhodium hexafluoride is produced by direct conversion of the metal in an excess of elemental fluorine (F 2 ).
properties
Rhodium hexafluoride is a black crystalline solid that melts at around 70 ° C. It crystallizes in the orthorhombic crystal system (measured at −140 ° C) in the space group Pnma (space group no. 62) with the lattice parameters a = 932.3 pm , b = 847.4 pm and c = 491.0 pm and four formula units per unit cell with a calculated density of 3.71 g · cm −3 . The RhF 6 molecule is octahedral ( O h ); the Rh – F bond length is 182.4 pm.
Individual evidence
- ↑ a b c David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-85.
- ↑ a b c T. Drews, J. Supeł, A. Hagenbach, K. Seppelt: "Solid State Molecular Structures of Transition Metal Hexafluorides", in: Inorganic Chemistry , 2006 , 45 (9), pp. 3782-3788; doi : 10.1021 / ic052029f ; PMID 16634614 .
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
literature
- Gmelin's Handbook of Inorganic Chemistry , System No. 64, Rhodium, Part B 1, pp. 70-73.