Chemical compound with formula RhF₆
Rhodium hexafluoride Names IUPAC name rhodium(VI) fluoride
Other namesrhodium hexafluoride
Identifiers Key: PDNXMXVYNVZBTD-UHFFFAOYSA-H
InChI=1/6FH.2Rh/h6*1H;;/q;;;;;;+6/p-6
Properties F 6 Rh Molar mass 216.91 g/mol Appearance black crystalline solid[ 1] Density 3.71g/mL[ 2] Melting point ≈ 70 °C (158 °F; 343 K)[ 1] Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Rhodium hexafluoride , alsorhodium(VI) fluoride , (RhF6 ) is theinorganic compound ofrhodium andfluorine . 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 binaryhexafluorides .
Rhodium hexafluoride was discovered by American radiochemists in 1961, soon after the discovery ofruthenium hexafluoride .[ 3] It is prepared by reaction of rhodium metal with an excess of elementalfluorine :[ 4]
Rh + 3 F2 → RhF6 The RhF6 molecule hasoctahedral molecular geometry . Consistent with its d3 configuration, the six Rh–Fbond lengths are equivalent, being 1.824 Å.[ 2] It crystallises in anorthorhombic space groupPnma withlattice parameters ofa = 9.323 Å ,b = 8.474 Å, andc = 4.910 Å.
Like some other metal fluorides, RhF6 is highly oxidizing. It attacks glass,[ 4] and can even react with elementaloxygen .[ 5]
^a b c CRC Handbook of Chemistry and Physics , 90th Edition, CRC Press, Boca Raton, Florida, 2009,ISBN 978-1-4200-9084-0 , Section 4,Physical Constants of Inorganic Compounds , p. 4-85.^a b Drews, T.; Supeł, J.; Hagenbach, A.; Seppelt, K. (2006). "Solid State Molecular Structures of Transition Metal Hexafluorides".Inorganic Chemistry .45 (9):3782– 3788.doi :10.1021/ic052029f .PMID 16634614 . ^ Chernick, Cedric L.; Claassen, Howard H.; Weinstock, Bernard (1961)."RHODIUM HEXAFLUORIDE" .Journal of the American Chemical Society .83 (14):3165– 3166.doi :10.1021/ja01475a046 .ISSN 0002-7863 . ^a b 《无机化学丛书》第九卷:锰分族、铁系、铂系 (in Chinese). 北京: 科学出版社. 1991. p. 478.ISBN 7-03-002238-6 .^ Riedel, Sebastian; Kaupp, Martin (2009)."The highest oxidation states of the transition metal elements" (PDF) .Coordination Chemistry Reviews .253 (5– 6). Elsevier:606– 624.doi :10.1016/j.ccr.2008.07.014 . [permanent dead link ]
Known binary hexafluorides
Predicted binary hexafluorides
Noble gas binary hexafluorides Transition metal binary hexafluorides Actinide binary hexafluorides
Rh(0)
Rh(I)
Rh(II) Organorhodium(II) compunds
Rh(III) Organorhodium(III) compunds
Rh(IV) Rh(V) Rh(VI)
Salts and covalent derivatives of the
fluoride ion
PF− 6 ,AsF− 6 ,SbF− 6 compoundsAlF2− 5 ,AlF3− 6 compoundschlorides, bromides, iodides and pseudohalogenides SiF2− 6 ,GeF2− 6 compoundsOxyfluorides Organofluorides with transition metal, lanthanide, actinide, ammonium nitric acids bifluorides thionyl, phosphoryl, and iodosyl
Salts and covalent derivatives of the
fluoride ion