Chromium oxytetrafluoride
{{Chembox
| Name = Chromium oxytetrafluoride
| ImageFile = CrOF4.svg
| ImageSize = 110
| ImageAlt =
| IUPACName = Chromium(VI) tetrafluoride oxide
| OtherNames = {{ubl|Chromium fluoride oxide|Chromium oxide tetrafluoride|Chromium tetrafluoride oxide}}
|Section1={{Chembox Identifiers
| CASNo = 23276-90-6
| PubChem =
| StdInChI=1S/Cr.4FH.O/h;4*1H;/q+4;;;;;/p-4
| StdInChIKey=MHSCZPAMCXOZTI-UHFFFAOYSA-J
| SMILES = F[Cr](F)(F)(F)=O
}}
|Section2={{Chembox Properties
| Formula = {{chem2|CrOF4}}
| Cr=1|O=1|F=4
| Appearance = purple solid
| Density =
| MeltingPtC = 55
| MeltingPt_notes =
| BoilingPt =
| BoilingPt_notes =
| Solubility = }}
|Section7={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt = }}
| Section9 = {{Chembox Related
| OtherAnions =
| OtherCations = {{ubl|Molybdenum oxytetrafluoride|Tungsten oxytetrafluoride}}
| OtherCompounds = {{ubl|Chromyl fluoride|Thionyl tetrafluoride}}
}}
}}
Chromium oxytetrafluoride is the inorganic compound with the formula {{chem2|CrOF4|auto=1}}. It is a purple, volatile, diamagnetic solid. The compound is classified as an oxyfluoride.{{cite journal |last1=Hope |first1=Eric G. |last2=Jones |first2=Peter J. |last3=Levason |first3=William |last4=Ogden |first4=J. Steven |last5=Tajik |first5=Mahmoud |last6=Turff |first6=Jeremy W. |title=Characterisation of chromium(VI) oxide tetrafluoride, CrOF4, and caesium pentafluoro-oxochromate(VI) Cs[CrOF5] |journal=Journal of the Chemical Society, Dalton Transactions |date=1 January 1985 |issue=3 |pages=529–533 |doi=10.1039/DT9850000529 |url=https://pubs.rsc.org/en/content/articlelanding/1985/dt/dt9850000529 |access-date=18 July 2024 |language=en |issn=1364-5447|url-access=subscription }}{{cite journal |last1=Mallela |first1=S. P. |last2=Shreeve |first2=Jean'ne M. |last3=DesMarteau |first3=Darryl D. |title=Chromium(V) Fluoride and Chromium(VI) Tetrafluoride Oxide |journal=Inorganic Syntheses |date=January 1992 |volume=29 |pages=124–127 |doi=10.1002/9780470132609.ch29 |url=https://www.researchgate.net/publication/319572140_ChromiumV_Fluoride_and_ChromiumVI_Tetrafluoride_Oxide}}
Synthesis
It can be prepared by fluorination of chromyl fluoride with krypton difluoride:{{cite journal |doi=10.1021/ic00233a013 |title=Synthesis and Characterization of CrF4O, KrF2.CrF4O, and NO+CrF5O− |date=1986 |last1=Christe |first1=Karl O. |last2=Wilson |first2=William W. |last3=Bougon |first3=Roland A. |journal=Inorganic Chemistry |volume=25 |issue=13 |pages=2163–2169}}
:{{chem2|2 CrO2F2 + 2 KrF2 → 2 CrOF4 + O2 + 2 Kr}}
The compound serves as a weak Lewis base with noble gas difluorides.{{cite journal |doi=10.1002/chem.201902005 |title=Syntheses, Structures, and Bonding of NGF2⋅CrOF4, NGF2⋅2CrOF4 (Ng=Kr, Xe), and (CrOF4)∞ |date=2019 |last1=Mercier |first1=Hélène P. A. |last2=Breddemann |first2=Ulf |last3=Brock |first3=David S. |last4=Bortolus |first4=Mark R. |last5=Schrobilgen |first5=Gary J. |journal=Chemistry – A European Journal |volume=25 |issue=52 |pages=12105–12119 |pmid=31172609}} It also binds fluoride to give the pentafluoride.
References
{{Chromium compounds}}
{{fluorine compounds}}
Category:Chromium(VI) compounds