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{{Chembox
{{Chembox
<!-- Images -->
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| ImageFile =
| ImageFile = Xenon-tetrafluoride-3D-balls.png
| ImageSize = 200px
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| IUPACName =
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| Section1 = {{Chembox Identifiers
| Section1 = {{Chembox Identifiers
| CASNo =
| CASNo = 13709-53-0
| PubChem =
| PubChem =
| ChemSpiderID =
| ChemSpiderID =
| EINECS =
| EINECS =
| DTXSID =
| DTXSID =
| SMILES =
| SMILES = [Kr](F)(F)(F)F
| StdInChI=
| StdInChI= 1S/F4Kr/c1-5(2,3)4
| StdInChIKey=
| StdInChIKey= PLAFPZRFEDSAJL-UHFFFAOYSA-N
}}
}}
| Section2 = {{Chembox Properties
| Section2 = {{Chembox Properties
| Kr=1|F=4
| Kr=1|F=4
| Appearance = white crystalline solid
| Appearance =
| Density = g/cm<sup>3</sup>
| Density =
| Solubility =
| Solubility =
| MeltingPtC =
| MeltingPtC =
| BoilingPtC =
| BoilingPtC =
| VaporPressure =
| VaporPressure =
| Molar_mass =
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| Section4 = {{Chembox Structure
| Section4 = {{Chembox Structure
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'''Osmium(IV) fluoride''' is an [[inorganic]] chemical compound of [[krypton]] and [[fluorine]] with the chemical formula {{chem|Kr|F|4}}.<ref>{{cite book |last1=O'Donnell |first1=T. A. |title=The Chemistry of Fluorine: Comprehensive Inorganic Chemistry |date=8 June 2017 |publisher=[[Elsevier]] |isbn=978-1-4831-4642-3 |page=1026 |url=https://www.google.ru/books/edition/The_Chemistry_of_Fluorine/ED79BAAAQBAJ?hl=en&gbpv=1&dq=Krypton+tetrafluoride&pg=PA1026&printsec=frontcover |access-date=28 March 2023 |language=en}}</ref>
'''Krypton(IV) fluoride''' is a hypothetical [[inorganic]] chemical compound of [[krypton]] and [[fluorine]] with the chemical formula {{chem2|KrF4}}. At one time researchers thought they had synthesized it, but the claim was discredited.<ref>{{cite book |last1=O'Donnell |first1=T. A. |title=The Chemistry of Fluorine: Comprehensive Inorganic Chemistry |date=8 June 2017 |publisher=[[Elsevier]] |isbn=978-1-4831-4642-3 |page=1026 |url=https://books.google.com/books?id=ED79BAAAQBAJ&dq=Krypton+tetrafluoride&pg=PA1026 |access-date=28 March 2023 |language=en}}</ref> The compound is predicted to be difficult to make and unstable if made.<ref name="Dixon2007">{{cite journal |title= Heats of Formation of Krypton Fluorides and Stability Predictions for KrF<sub>4</sub> and KrF<sub>6</sub> from High Level Electronic Structure Calculations |first1= David A. |last1= Dixon |first2= Tsang-Hsiu |last2= Wang |first3= Daniel J. |last3= Grant |first4= Kirk A. |last4= Peterson |first5= Karl O. |last5= Christe |first6= Gary J. |last6= Schrobilgen |journal= Inorg. Chem. |year= 2007 |volume= 46 |issue= 23 |pages= 10016–10021 |doi= 10.1021/ic701313h |pmid= 17941630 }}</ref> Theoretical analysis indicates {{chem2|KrF4}} would have an approximately [[square planar molecular geometry]].<ref name="Dixon2007"/>


==Synthesis==
==Synthesis==
Passing electrid discharge through krypton-fluorine mixture:<ref>{{cite book |title=Advanced Inorganic Chemistry Vol-1 |publisher=Krishna Prakashan Media |isbn=978-81-87224-03-7 |page=846 |url=https://www.google.ru/books/edition/Advanced_Inorganic_Chemistry_Vol_1/0uwDTrxyaB8C?hl=en&gbpv=1&dq=Krypton+tetrafluoride&pg=PA846&printsec=frontcover |access-date=28 March 2023 |language=en}}</ref>
The claimed synthesis was by passing electric discharge through krypton-fluorine mixture:<ref>{{cite book |title=Advanced Inorganic Chemistry Vol-1 |publisher=Krishna Prakashan Media |isbn=978-81-87224-03-7 |page=846 |url=https://books.google.com/books?id=0uwDTrxyaB8C&dq=Krypton+tetrafluoride&pg=PA846 |access-date=28 March 2023 |language=en}}</ref>


::<chem> Kr + 2F2 -> KrF4 </chem>
::{{chem2|Kr + 2F2 -> KrF4}}


==Physiscal properties==
==Physical properties==
The compound forms white crystalline solid.<ref>{{cite book |last1=Cotton |first1=F. Albert |title=Progress in Inorganic Chemistry, Volume 6 |date=17 September 2009 |publisher=[[John Wiley & Sons]] |isbn=978-0-470-16657-4 |page=260 |url=https://www.google.ru/books/edition/Progress_in_Inorganic_Chemistry_Volume_6/IhkQIoEGL24C?hl=en&gbpv=1&dq=Krypton+tetrafluoride&pg=PA260&printsec=frontcover |access-date=28 March 2023 |language=en}}</ref>
The claimed compound formed white crystalline solid.<ref>{{cite book |last1=Cotton |first1=F. Albert |title=Progress in Inorganic Chemistry, Volume 6 |date=1964 |publisher=[[John Wiley & Sons]] |isbn=978-0-470-16657-4 |page=260 |url=https://books.google.com/books?id=IhkQIoEGL24C&dq=Krypton+tetrafluoride&pg=PA260 |access-date=28 March 2023 |language=en}}</ref> Thermally, it is less stable than [[Xenon tetrafluoride|{{chem2|XeF4}}]].<ref name="SC">{{cite journal |last1=Grosse |first1=A. V. |last2=Kirshenbaum |first2=A. D. |last3=Streng |first3=A. G. |last4=Streng |first4=L. V. |title=Krypton Tetrafluoride: Preparation and Some Properties |journal=[[Science (journal)|Science]] |date=15 March 1963 |volume=139 |issue=3559 |pages=1047–1048 |doi=10.1126/science.139.3559.1047 |pmid=17812982 |bibcode=1963Sci...139.1047G |url=https://www.science.org/doi/10.1126/science.139.3559.1047 |access-date=28 March 2023}}</ref>

==Chemical properties==
On hydrolysis the compound yields krypton, oxygen, and hydrogen fluoride.


==References==
==References==
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[[Category:Krypton compounds]]
[[Category:Krypton compounds]]
[[Category:Fluorine compounds]]
[[Category:Fluorides]]
[[Category:Nonmetal halides]]
[[Category:Nonmetal halides]]
[[Category:Hypothetical chemical compounds]]


{{inorganic-compound-stub}}
{{inorganic-compound-stub}}

Latest revision as of 20:36, 9 June 2024

Krypton tetrafluoride
Identifiers
3D model (JSmol)
  • InChI=1S/F4Kr/c1-5(2,3)4
    Key: PLAFPZRFEDSAJL-UHFFFAOYSA-N
  • [Kr](F)(F)(F)F
Properties
F4Kr
Molar mass 159.792 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Krypton(IV) fluoride is a hypothetical inorganic chemical compound of krypton and fluorine with the chemical formula KrF4. At one time researchers thought they had synthesized it, but the claim was discredited.[1] The compound is predicted to be difficult to make and unstable if made.[2] Theoretical analysis indicates KrF4 would have an approximately square planar molecular geometry.[2]

Synthesis

[edit]

The claimed synthesis was by passing electric discharge through krypton-fluorine mixture:[3]

Kr + 2F2 → KrF4

Physical properties

[edit]

The claimed compound formed white crystalline solid.[4] Thermally, it is less stable than XeF4.[5]

References

[edit]
  1. ^ O'Donnell, T. A. (8 June 2017). The Chemistry of Fluorine: Comprehensive Inorganic Chemistry. Elsevier. p. 1026. ISBN 978-1-4831-4642-3. Retrieved 28 March 2023.
  2. ^ a b Dixon, David A.; Wang, Tsang-Hsiu; Grant, Daniel J.; Peterson, Kirk A.; Christe, Karl O.; Schrobilgen, Gary J. (2007). "Heats of Formation of Krypton Fluorides and Stability Predictions for KrF4 and KrF6 from High Level Electronic Structure Calculations". Inorg. Chem. 46 (23): 10016–10021. doi:10.1021/ic701313h. PMID 17941630.
  3. ^ Advanced Inorganic Chemistry Vol-1. Krishna Prakashan Media. p. 846. ISBN 978-81-87224-03-7. Retrieved 28 March 2023.
  4. ^ Cotton, F. Albert (1964). Progress in Inorganic Chemistry, Volume 6. John Wiley & Sons. p. 260. ISBN 978-0-470-16657-4. Retrieved 28 March 2023.
  5. ^ Grosse, A. V.; Kirshenbaum, A. D.; Streng, A. G.; Streng, L. V. (15 March 1963). "Krypton Tetrafluoride: Preparation and Some Properties". Science. 139 (3559): 1047–1048. Bibcode:1963Sci...139.1047G. doi:10.1126/science.139.3559.1047. PMID 17812982. Retrieved 28 March 2023.
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