chloryl fluoride
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 446441977
| Name = Chloryl fluoride
| ImageFile = Chloryl fluoride.svg
| ImageFile2 = Chloryl-fluoride-3D-vdW.png
| OtherNames = {{ubl|Chlorine dioxide fluoride|Chlorine(V) fluoride dioxide}}
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 13637-83-7
| PubChem = 139523
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID = 123044
| SMILES = FCl(=O)=O
| InChI = 1/ClFO2/c2-1(3)4
| InChIKey = YVRLYFHVJLYEHM-UHFFFAOYAO
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/ClFO2/c2-1(3)4
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = YVRLYFHVJLYEHM-UHFFFAOYSA-N
}}
|Section2={{Chembox Properties
| Formula = {{chem2|ClO2F}}
| Cl = 1 | O = 2 | F = 1
| Appearance = Colorless gas
| Density = 3.534 g/L
| MeltingPt = −115 °C
| BoilingPt = −6 °C
}}
|Section8={{Chembox Related
| OtherCompounds = {{ubl|Bromyl fluoride|Iodyl fluoride|Perchloryl fluoride|Chloryl trifluoride}}
}}
}}
Chloryl fluoride is the chemical compound with the formula {{chem2|ClO2F|auto=1}}. This compound is a gas boiling at −6 °C. It is commonly encountered as side-product in reactions of chlorine fluorides with oxygen sources.Christe, K. O.; Wilson, R. D.; Schack, C. J. "Chloryl fluoride" Inorganic Syntheses, 1986, volume 24, pages 3–5. {{ISBN|0-471-83441-6}} https://onlinelibrary.wiley.com/doi/10.1002/9780470132555.ch2 It is the acyl fluoride of chloric acid.
Preparation
{{chem2|ClO2F}} was first reported by Schmitz and Schumacher in 1942, who prepared it by the fluorination of chlorine dioxide.{{cite journal | last=Schmitz | first=H. | last2=Schumacheb | first2=H. J. | title=Über eine neue Reaktion des Chlordioxyds. Die Bildung einer Verbindung der Formel ClO2F | journal=Zeitschrift für anorganische und allgemeine Chemie | publisher=Wiley | volume=249 | issue=3 | date=1942-04-29 | issn=0863-1786 | doi=10.1002/zaac.19422490302 | pages=238–244 | language=de}} The compound is more conveniently prepared by reaction of sodium chlorate and chlorine trifluoride{{cite book | last=Wiberg | first=Egon | last2=Wiberg | first2=Nils | last3=Holleman | first3=A. F. | title=Inorganic chemistry | publisher=Academic Press | publication-place=San Diego | date=2001 | isbn=0-12-352651-5 | oclc=48056955|page=1797}} and purified by vacuum fractionation, i.e. selectively condensing this species separately from other products.
:{{chem2|6 NaClO3 + 4 ClF3 → 6 ClO2F + 2 Cl2 + 3 O2 + 6 NaF}}
Structure
In contrast to Dioxygen difluoride, {{chem2|ClO2F}} is a pyramidal molecule as predicted by VSEPR. The differing structures reflects the greater tendency of chlorine to exist in positive oxidation states with oxygen and fluorine ligands. The related Cl-O-F compound perchloryl fluoride, {{chem2|ClO3F}}, is tetrahedral.
The related bromine compound bromyl fluoride ({{chem2|BrO2F}}) adopts the same structure as {{chem2|ClO2F}}, whereas iodyl fluoride ({{chem2|IO2F}}) forms a polymeric substance under standard conditions.{{cite book|title=Lehrbuch der anorganischen Chemie|author1=Holleman, A.F.|author2=Wiberg, E.|author3=Wiberg, N.|date=1995|publisher=de Gruyter|isbn=9783110126419|url=https://books.google.com/books?id=eGkvSDAqY9gC|page=501|access-date=2015-02-20}}
Precautions
Rocket fuel chemist John Drury Clark reported in his book Ignition! that chloryl fluoride "is indecently reactive, and the hardest to keep of all the CI-O-F compounds, since it apparently dissolves the protective metal fluoride coatings that make the storage of {{chem2|ClF3}} comparatively simple."{{cite book |isbn = 978-0-8135-9918-2 |title = Ignition!: An Informal History of Liquid Rocket Propellants |last1 = Clark |first1 = John Drury |author-link=John Drury Clark |date = 23 May 2018 |publisher = Rutgers University Press |url=https://books.google.com/books?id=BdU4DwAAQBAJ&q=perchloryl%20fluoride |pages=302 |oclc=281664}}
References
External links
- [http://webbook.nist.gov/cgi/cbook.cgi?ID=C13637837 WebBook page for ClO2F]
{{Chlorine compounds}}
{{fluorine compounds}}