Selenoyl fluoride
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| verifiedrevid = 428725254
| ImageFile = Selenoyl_fluoride_structure.png
| ImageSize = 150px
| ImageFile1 = Selenoyl fluoride 3D Space Filling.png
| ImageSize1 = 150px
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| IUPACName =
| PIN =
| OtherNames =
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 14984-81-7
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID = 10329076
| PubChem = 23236013
| SMILES = O=[Se](=O)(F)F
| InChI = 1/F2O2Se/c1-5(2,3)4
| InChIKey = VCPFQVXWYPMUKZ-UHFFFAOYAS
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/F2O2Se/c1-5(2,3)4
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = VCPFQVXWYPMUKZ-UHFFFAOYSA-N }}
|Section2={{Chembox Properties
| Formula = SeO2F2
| MolarMass = 148.95 g/mol
| Appearance = Gas.
| Density =
| MeltingPtC = -99.5
| MeltingPt_ref = CRC Handbook of Chemistry and Physics
| BoilingPtC = -8.4
| BoilingPt_ref = Seppelt, K. "Selenoyl difluoride" Inorganic Syntheses, 1980, volume XX, pp. 36-38. {{ISBN|0-471-07715-1}}.
| Solubility = }}
|Section3={{Chembox Hazards
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|Section8={{Chembox Related
| OtherCations = SO2F2
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Selenoyl fluoride, selenoyl difluoride, selenium oxyfluoride, or selenium dioxydifluoride is a chemical compound with the formula SeO2F2.
Structure
The shape of the molecule is a distorted tetrahedron with the O-Se-O angle being 126.2°, the O-Se-F angle being 108.0° and F-Se-F being 94.1°.Wai-Kee Li, Gong-du Zhou, Thomas C. W. Mak [https://books.google.com/books?id=2qAa5hp6KX4C&pg=PA651&lpg=PA651 Advanced structural inorganic chemistry] page 651 2008 {{ISBN|0-19-921694-0}} The Se-F bond length is 1.685 Å and the selenium to oxygen bond is 1.575 Å long.Kolbjørn Hagen, Virginia R. Cross and Kenneth Hedberg "The molecular structure of selenonyl fluoride, SeO2F2, and sulfuryl fluoride, SO2F2, as determined by gas-phase electron diffraction" Journal of Molecular Structure 1978 volume 44 issue 2 page 187 {{doi|10.1016/0022-2860(78)87027-6}}
Formation
Selenoyl fluoride can be formed by the action of warm fluorosulfonic acid on barium selenateAdvanced Inorganic Chemistry A Comprehensive Text Cotton and Wilkinson or selenic acid. SeO3 + SeF4 can give this gas along with other oxyfluorides.
Reactions
Selenoyl fluoride is more reactive than its analogon sulfuryl fluoride. It is easier to hydrolyse and to reduce. It may react violently upon contact with ammonia.
Selenoyl fluoride reacting with xenon difluoride gives FXeOSeF5.{{cite web |url=https://www.scribd.com/doc/30122309/Noble-Gas-Compounds |title=Noble Gas Compounds |website=www.scribd.com |url-status=dead |archive-url=https://web.archive.org/web/20121104234856/http://www.scribd.com/doc/30122309/Noble-Gas-Compounds |archive-date=2012-11-04}}