Chromium(IV) fluoride |
Names |
IUPAC name Chromium(IV) fluoride |
Other names Chromium fluoride, Chromium tetrafluoride |
Identifiers |
CAS Number | |
3D model (JSmol) | |
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UNII | - LXA70EM86D
Y
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| - DTXSID90721095
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InChI=1S/Cr.4FH/h;4*1H/q+4;;;;/p-4 Key: SYJRAUIOIRVQSW-UHFFFAOYSA-J |
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Properties |
Chemical formula | CrF4 |
Molar mass | 127.9897 g·mol−1 |
Appearance | green crystals,[1] amorphous brown beads[2] |
Density | 2.89 g/cm3[1] |
Melting point | 277 °C (531 °F; 550 K)[1] |
Boiling point | ~ 400 °C (752 °F; 673 K)[2] |
Solubility in water | reacts with water[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references |
Chemical compound
Chromium(IV) fluoride is an inorganic compound with the chemical formula CrF4. It has a dark greenish-black color when solid. It rapidly hydrolysizes in presence of moisture in air or directly in water.[3]
Synthesis
Powdered chromium or CrCl3 is exposed to fluorine gas at a temperature of 350-500 °C, which creates a mix of CrF4 and CrF5. The CrF4 settles out as varnish-like brown beads upon cooling.[2]
Reactions
Chromium(IV) fluoride will react with water:
![{\displaystyle {\ce {CrF4 + 2H2O -> CrO2 + 4HF}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/5a300437b74d6f9345d4ed32701849bc2959a28b)
References
- ^ a b c d Perry, Dale L. (2011). Handbook of Inorganic Compounds, Second Edition. Boca Raton, Florida: CRC Press. p. 125. ISBN 978-1-43981462-8. Retrieved 2014-01-10.
- ^ a b c Brauer, Georg (1963) [1960]. Handbuch Der Präparativen Anorganischen Chemie [Handbook of Preparative Inorganic Chemistry] (in German). Vol. 1. Stuttgart; New York, New York: Ferdinand Enke Verlag; Academic Press, Inc. p. 258. ISBN 978-0-32316127-5. Retrieved 2014-01-12.
- ^ Clark, H. C.; Sadana, Y. N. (1964-01-01). "Some Reactions of Chromium Tetrafluoride". Canadian Journal of Chemistry. 42 (1): 50–56. doi:10.1139/v64-008. ISSN 0008-4042.
Chromium(0) | Organochromium(0) compounds | Cr(C6H6)2 CrC6H6(CO)3 |
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Chromium(I) | Organochromium(I) compounds | |
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Chromium(II) | - CrH2
- Cr3C2
- Cr(C2O4)
- Cr(CH3CO2)2
- CrSi2
- CrO
- CrS
- CrSO4
- CrSe
- CrF2
- CrCl2
- CrBr2
- CrI2
Organochromium(II) compounds | |
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Chromium(II, III) | |
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Chromium(III) | - CrB
- [Cr3O(CH3CO2)6(H2O)3]+[CH3CO2]−
- CrN
- Cr(NO3)3
- CrPO4
- Cr2O3
- Cr(OH)3
- Cr2S3
- Cr2(SO4)3
- Cr2Te3
- CrF3
- CrCl3
- Cr(ClO4)3
- CrBr3
- CrI3
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Chromium(IV) | - CrSi
- CrO2
- CrF4
- CrCl4
- CrBr4
- CrI4
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Chromium(V) | |
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Chromium(VI) | - CrO3
- CrO(O2)2
- H2CrO4/H2Cr2O7
- CrO2F2
- CrOF4
- CrO2Cl2
- CrO2Br2
- [C5H5NH]+CrO3Cl−
- CrF6 (hypothetical)
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Polyatomic ion | |
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Salts and covalent derivatives of the fluoride ion |
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HF | | | | ?HeF2 | LiF | BeF2 | BF BF3 B2F4 +BO3 | CF4 CxFy +CO3 | NF3 FN3 N2F2 NF N2F4 NF2 ?NF5 | OF2 O2F2 OF O3F2 O4F2 ?OF4 | F2 | Ne | NaF | MgF2 | AlF AlF3 | SiF4 | P2F4 PF3 PF5 | S2F2 SF2 S2F4 SF3 SF4 S2F10 SF6 +SO4 | ClF ClF3 ClF5 | ?ArF2 ?ArF4 | KF | CaF CaF2 | | ScF3 | TiF2 TiF3 TiF4 | VF2 VF3 VF4 VF5 | CrF2 CrF3 CrF4 CrF5 ?CrF6 | MnF2 MnF3 MnF4 ?MnF5 | FeF2 FeF3 FeF4 | CoF2 CoF3 CoF4 | NiF2 NiF3 NiF4 | CuF CuF2 ?CuF3 | ZnF2 | GaF2 GaF3 | GeF2 GeF4 | AsF3 AsF5 | Se2F2 SeF4 SeF6 +SeO3 | BrF BrF3 BrF5 | KrF2 ?KrF4 ?KrF6 | RbF | SrF SrF2 | | YF3 | ZrF2 ZrF3 ZrF4 | NbF4 NbF5 | MoF4 MoF5 MoF6 | TcF4 TcF 5 TcF6 | RuF3 RuF 4 RuF5 RuF6 | RhF3 RhF4 RhF5 RhF6 | PdF2 Pd[PdF6] PdF4 ?PdF6 | Ag2F AgF AgF2 AgF3 | CdF2 | InF InF3 | SnF2 SnF4 | SbF3 SbF5 | TeF4 ?Te2F10 TeF6 +TeO3 | IF IF3 IF5 IF7 +IO3 | XeF2 XeF4 XeF6 ?XeF8 | CsF | BaF2 | | LuF3 | HfF4 | TaF5 | WF4 WF5 WF6 | ReF4 ReF5 ReF6 ReF7 | OsF4 OsF5 OsF6 ?OsF 7 ?OsF 8 | IrF2 IrF3 IrF4 IrF5 IrF6 | PtF2 Pt[PtF6] PtF4 PtF5 PtF6 | AuF AuF3 Au2F10 ?AuF6 AuF5•F2 | Hg2F2 HgF2 ?HgF4 | TlF TlF3 | PbF2 PbF4 | BiF3 BiF5 | ?PoF2 PoF4 PoF6 | AtF ?AtF3 ?AtF5 | RnF2 ?RnF 4 ?RnF 6 | FrF | RaF2 | | LrF3 | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og | | ↓ | | | | LaF3 | CeF3 CeF4 | PrF3 PrF4 | NdF2 NdF3 NdF4 | PmF3 | SmF2 SmF3 | EuF2 EuF3 | GdF3 | TbF3 TbF4 | DyF2 DyF3 DyF4 | HoF3 | ErF3 | TmF2 TmF3 | YbF2 YbF3 | AcF3 | ThF3 ThF4 | PaF4 PaF5 | UF3 UF4 UF5 UF6 | NpF3 NpF4 NpF5 NpF6 | PuF3 PuF4 PuF5 PuF6 | AmF2 AmF3 AmF4 ?AmF6 | CmF3 CmF4 ?CmF6 | BkF3 BkF 4 | CfF3 CfF4 | EsF3 EsF4 ?EsF6 | Fm | Md | No | |
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PF6−, AsF6−, SbF6− compounds | - AgPF6
- KAsF6
- LiAsF6
- NaAsF6
- HPF6
- HSbF6
- NH4PF6
- LiSbF6
- KPF6
- KSbF6
- LiPF6
- NaPF6
- NaSbF6
- TlPF6
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AlF6− compounds | - (NH4)3[AlF6]
- Cs2AlF5
- Li3AlF6
- K3AlF6
- Na3AlF6
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chlorides, bromides, iodides and pseudohalogenides | |
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SiF62-, GeF62- compounds | - BaSiF6
- BaGeF6
- (NH4)2SiF6
- Na2[SiF6]
- K2[SiF6]
- Li2GeF6
- Li2SiF6
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Oxyfluorides | - BrOF3
- BrO2F
- BrO3F
- LaOF
- ThOF2
- VOF
3 - TcO
3F - WOF
4 - YOF
- ClOF3
- ClO2F3
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Organofluorides | - CBrF3
- CBr2F2
- CBr3F
- CClF3
- CCl2F2
- CCl3F
- CF2O
- CF3I
- CHF3
- CH2F2
- CH3F
- C2Cl3F3
- C2H3F
- C6H5F
- C7H5F3
- C15F33N
- C3H5F
- C6H11F
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with transition metal, lanthanide, actinide, ammonium | - VOF3
- CrOF4
- CrF2O2
- NH4F
- (NH4)3CrF6
- (NH4)3GaF6
- (NH4)2GeF6
- (NH4)3FeF6
- (NH4)3InF6
- NH4NbF6
- (NH4)2SnF6
- NH4TaF6
- (NH4)3VF6
- (NH4)2ZrF6
- CsXeF7
- Li2SnF6
- Li2TiF6
- LiWF6
- Li2ZrF6
- K2TiF6
- Rb2TiF6
- Na2TiF6
- Na2ZrF6
- K2NbF7
- K2TaF7
- K2ZrF6
- UO2F2
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nitric acids | |
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bifluorides | |
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thionyl, phosphoryl, and iodosyl | - F2OS
- F3OP
- PSF3
- IOF3
- IO3F
- IOF5
- IO2F
- IO2F3
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