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Chromium hexafluoride or chromium(VI) fluoride (CrF6) is a hypothetical chemical compound between chromium and fluorine with the chemical formula CrF6. It was previously thought to be an unstable yellow solid decomposing at −100 °C,[1] but this has been shown to be a misidentification of chromium pentafluoride, CrF5.[2]
Unsuccessful attempts at synthesis

CrF6 used to be thought to be produced by exhaustive fluorination of chromium metal at 400 °C and 20 MPa of pressure, and immediate freezing out of the reaction chamber to prevent decomposition:

Cr + 3 F2 → CrF6

However, it has been shown that chromium pentafluoride (CrF5) is formed instead:

2 Cr + 5 F2 → 2 CrF5

and that CrF6 has yet to be synthesized.
References

Hope, Eric G.; Levason, William.; Ogden, J. Steven (1991). "Is chromium hexafluoride octahedral? Experiment still suggests "yes!"". Inorganic Chemistry. 30 (26): 4873. doi:10.1021/ic00026a002.

Riedel, Sebastian; Kaupp, Martin (2009). "The highest oxidation states of the transition metal elements". Coordination Chemistry Reviews. 253 (5–6): 606–624. doi:10.1016/j.ccr.2008.07.014.

Binary hexafluorides
Known binary hexafluorides
Chalcogen binary hexafluorides
  • SF6
  • SeF6
  • TeF6
  • PoF6
Noble gas binary hexafluorides
  • XeF6
Transition metal binary hexafluorides
  • MoF6
  • TcF6
  • RuF6
  • RhF6
  • WF6
  • ReF6
  • OsF6
  • IrF6
  • PtF6
Actinide binary hexafluorides
  • UF6
  • NpF6
  • PuF6
Predicted binary hexafluorides
Noble gas binary hexafluorides
  • KrF6
  • RnF
    6
Transition metal binary hexafluorides
Actinide binary hexafluorides
  • AmF6
  • CmF6
  • EsF6

Chromium compounds

Chromium(0)
  • Cr(CO)6
Organochromium(0) compounds
  • Cr(C6H6)2
  • CrC6H6(CO)3
  • Chromium(I)
    • CrH
    Organochromium(I) compounds
    • Cr2(C5H5)2(CO)6
    Chromium(II)
    • Cr(C2H3O2)2
    • CrBr2
    • Cr3C2
    • Cr(C2O4)
    • CrCl2
    • CrF2
    • CrH2
    • CrI2
    • CrO
    • CrSe
    • CrSi2
    • CrS
    • CrSO4
    Organochromium(II) compounds
    • Cr(C5H5)2
    Chromium(II, III)
    • Cr3C2
    Chromium(III)
    • [Cr3O(O2CCH3)6(OH2)3]+O2CCH3
    • CrB
    • CrBr3
    • CrCl3
    • Cr(ClO4)3
    • CrF3
    • CrI3
    • CrN
    • Cr(NO3)3
    • Cr(OH)3
    • Cr2O3
    • CrPO4
    • Cr2S3
    • Cr2(SO4)3
    • Cr2Te3
    Chromium(IV)
    • CrCl4
    • CrF4
    • CrBr4
    • CrO2
    • CrSi
    Chromium(V)
    • CrF5
    • K3Cr(O2)4
    Chromium(VI)
    • CrO3
    • CrO(O2)2
    • H2CrO4/H2Cr2O7
    • CrO2F2
    • CrO2Cl2
    • CrO2Br2
    • C5H5NHCrO3Cl
    • CrF6 (hypothetical)
    Polyatomic ion
    • Chromate and dichromate

    Fluorine compounds

    HF He
    LiF BeF2 BF
    BF3
    B2F4
    CF4
    CxFy
    NF3
    N2F4
    OF
    OF2
    O2F2
    O2F
    F Ne
    NaF MgF2 AlF
    AlF3
    SiF4 P2F4
    PF3
    PF5
    S2F2
    SF2
    S2F4
    SF4
    S2F10
    SF6
    ClF
    ClF3
    ClF5
    HArF
    ArF2
    KF CaF2 ScF3 TiF3
    TiF4
    VF2
    VF3
    VF4
    VF5
    CrF2
    CrF3
    CrF4
    CrF5
    CrF6
    MnF2
    MnF3
    MnF4
    FeF2
    FeF3
    CoF2
    CoF3
    NiF2
    NiF3
    CuF
    CuF2
    ZnF2 GaF3 GeF4 AsF3
    AsF5
    SeF4
    SeF6
    BrF
    BrF3
    BrF5
    KrF2
    KrF4
    KrF6
    RbF SrF2 YF3 ZrF4 NbF4
    NbF5
    MoF4
    MoF5
    MoF6
    TcF6 RuF3
    RuF4
    RuF5
    RuF6
    RhF3
    RhF5
    RhF6
    PdF2
    Pd[PdF6]
    PdF4
    PdF6
    AgF
    AgF2
    AgF3
    Ag2F
    CdF2 InF3 SnF2
    SnF4
    SbF3
    SbF5
    TeF4
    TeF6
    IF
    IF3
    IF5
    IF7
    XeF2
    XeF4
    XeF6
    XeF8
    CsF BaF2 * LuF3 HfF4 TaF5 WF4
    WF6
    ReF6
    ReF7
    OsF4
    OsF5
    OsF6
    OsF
    7
    OsF8
    IrF3
    IrF5
    IrF6
    PtF2
    Pt[PtF6]
    PtF4
    PtF5
    PtF6
    AuF
    AuF3
    Au2F10
    AuF5·F2
    HgF2
    Hg2F2
    HgF4
    TlF
    TlF3
    PbF2
    PbF4
    BiF3
    BiF5
    PoF4
    PoF6
    At RnF2
    RnF6
    Fr RaF2 ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
    * LaF3 CeF3
    CeF4
    PrF3
    PrF4
    NdF3 PmF3 SmF2
    SmF3
    EuF2
    EuF3
    GdF3 TbF3
    TbF4
    DyF3 HoF3 ErF3 TmF2
    TmF3
    YbF2
    YbF3
    ** AcF3 ThF4 PaF4
    PaF5
    UF3
    UF4
    UF5
    UF6
    NpF3
    NpF4
    NpF5
    NpF6
    PuF3
    PuF4
    PuF5
    PuF6
    AmF3
    AmF4
    AmF6
    CmF3 Bk Cf Es Fm Md No
    PF6, AsF6, SbF6 compounds
    • AgPF6
    • KAsF6
    • LiAsF6
    • NaAsF6
    • HPF6
    • HSbF6
    • NH4PF6
    • KPF6
    • KSbF6
    • LiPF6
    • NaPF6
    • NaSbF6
    • TlPF6
    AlF6 compounds
    • Cs2AlF5
    • K3AlF6
    • Na3AlF6
    chlorides, bromides, iodides
    and pseudohalogenides
    • BaClF
    • CFN
    • ClFO2
    SiF62-, GeF62- compounds
    • BaSiF6
    • BaGeF6
    • (NH4)2SiF6
    • Na2[SiF6]
    • K2[SiF6]
    Oxyfluorides
    • BrOF3
    • BrO2F
    • BrO3F
    • LaOF
    • ThOF2
    • VOF
      3
    • TcO
      3F
    • WOF
      4
    • YOF
    • ClOF3
    • ClO2F3
    Organofluorides
    • CBrF3
    • CBr2F2
    • CBr3F
    • CClF3
    • CCl2F2
    • CCl3F
    • CF2O
    • CF3I
    • CHF3
    • CH2F2
    • CH3F
    • C2Cl3F3
    • C2H3F
    • C6H5F
    • C7H5F3
    • C15F33N
    • C3H5F
    • C6H11F
    with transition metal,
    lanthanide, actinide, ammonium
    • VOF3
    • CrOF4
    • CrF2O2
    • NH4F
    • Na2TiF6
    • Na2ZrF6
    • K2NbF7
    • K2TaF7
    • UO2F2
    nitric acids
    • FNO
    • FNO2
    • FNO3
    bifluorides
    • KHF2
    • NaHF2
    • NH4HF2
    thionyl, phosphoryl,
    and iodosyl
    • F2OS
    • F3OP
    • PSF3
    • IOF3
    • IO3F
    • IOF5
    • IO2F
    • IO2F3
    Chemical formulas

    Chemistry Encyclopedia

    World

    Index

    Hellenica World - Scientific Library

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