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Rhodium hexafluoride

Chemical compound with formula RhF₆ From Wikipedia, the free encyclopedia

Rhodium hexafluoride
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Rhodium hexafluoride, also rhodium(VI) fluoride, (RhF6) is the inorganic compound of rhodium and fluorine. A black volatile solid,[1] it is a highly reactive material which starts to slowly thermally decompose already at room temperature and a rare example of a rhodium(VI) compound. It is one of seventeen known binary hexafluorides.

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Rhodium hexafluoride was discovered by American radiochemists in 1961, soon after the discovery of ruthenium hexafluoride.[3] It is prepared by reaction of rhodium metal with an excess of elemental fluorine:[4]

Rh + 3 F2 → RhF6

The RhF6 molecule has octahedral molecular geometry. Consistent with its d3 configuration, the six Rh–F bond lengths are equivalent, being 1.824 Å.[2] It crystallises in an orthorhombic space group Pnma with lattice parameters of a = 9.323 Å, b = 8.474 Å, and c = 4.910 Å.

Like some other metal fluorides, RhF6 is highly oxidizing. It attacks glass,[4] and can even react with elemental oxygen.[5]

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