Technetium(V) fluoride
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| ImageFile =
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| IUPACName =
| OtherNames = Technetium(V) fluoride
| Section1 = {{Chembox Identifiers
| CASNo = 31052-14-9
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| DTXSID =
| StdInChI=1S/5FH.Tc/h5*1H;/q;;;;;+5/p-5
| StdInChIKey = OSZPGOCLYCKXRN-UHFFFAOYSA-I
| SMILES = F[Tc](F)(F)(F)F
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| Section2 = {{Chembox Properties
| Tc=1|F=5
| Appearance = yellow crystals
| Density =
| Solubility = reacts with water
| MeltingPtC = 50
| BoilingPtC =
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| Section4 = {{Chembox Structure
| CrystalStruct = orthorhombic
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| Section7 = {{Chembox Hazards
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|Section6={{Chembox Related
| OtherCompounds = Rhenium pentafluoride
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Technetium pentafluoride is a binary inorganic chemical compound of technetium metal and fluorine with the chemical formula {{chem|Tc|F|5}}.{{cite web |title=WebElements Periodic Table » Technetium » technetium pentafluoride |url=https://www.webelements.com/compounds/technetium/technetium_pentafluoride.html |publisher=webelements.com |access-date=19 April 2023}}{{cite book |last1=Gutmann |first1=Viktor |title=Halogen Chemistry |date=2 December 2012 |publisher=Elsevier |isbn=978-0-323-14847-4 |page=197 |url=https://books.google.com/books?id=q0j8Imd8yQsC&dq=technetium+pentafluoride&pg=PA197 |access-date=19 April 2023 |language=en}}{{cite book |last1=Schwochau |first1=Klaus |title=Technetium: Chemistry and Radiopharmaceutical Applications |date=21 November 2008 |publisher=John Wiley & Sons |isbn=978-3-527-61337-3 |page=113 |url=https://books.google.com/books?id=g3QiV8Wr5ToC&dq=technetium+pentafluoride&pg=PA113 |access-date=19 April 2023 |language=en}}{{cite journal |title=Some physical properties of technetium pentafluoride |journal=Journal of Inorganic and Nuclear Chemistry |date=1 January 1976 |volume=28 |pages=231–232 |doi=10.1016/0022-1902(76)80635-5 |url=https://www.sciencedirect.com/science/article/abs/pii/0022190276806355 |access-date=19 April 2023 |language=en |issn=0022-1902|url-access=subscription }}
Synthesis
The compound can be synthesised by heating of technetium powder in a jet of fluorine diluted with nitrogen:
::{{chem2|2Tc + 5F2 -> 2TcF5}}
Another way to prepare it is the effect of iodine on technetium hexafluoride solution in iodine pentafluoride:{{cite book |last1=Schwochau |first1=Klaus |title=Technetium: Chemistry and Radiopharmaceutical Applications |date=21 November 2008 |publisher=John Wiley & Sons |isbn=978-3-527-61337-3 |page=114 |url=https://books.google.com/books?id=g3QiV8Wr5ToC&dq=technetium+pentafluoride+prepared&pg=PA114 |access-date=19 April 2023 |language=en}}
::{{chem2|2TcF6 + I2 -> 2TcF5 + 2IF}}
Physical properties
Technetium pentafluoride forms yellow crystals{{cite book |last1=Lide |first1=David R. |title=CRC Handbook of Chemistry and Physics, 85th Edition |date=29 June 2004 |publisher=CRC Press |isbn=978-0-8493-0485-9 |page=4-88 |url=https://books.google.com/books?id=WDll8hA006AC&dq=technetium+pentafluoride+CRC&pg=SA4-PA88 |access-date=19 April 2023 |language=en}} of orthorhombic crystal system.{{cite book |last1=Kemmitt |first1=R. D. W. |last2=Peacock |first2=R. D. |title=The Chemistry of Manganese, Technetium and Rhenium: Pergamon Texts in Inorganic Chemistry |date=26 January 2016 |publisher=Elsevier |isbn=978-1-4831-8762-4 |page=889 |url=https://books.google.com/books?id=c0n-BAAAQBAJ&dq=technetium+pentafluoride&pg=PA889 |access-date=19 April 2023 |language=en}} It reacts with water, and is volatile.
Chemical properties
The compound is hydrolyzed by water, disproportionating to more stable technetium compounds:
::{{chem2|3TcF5 + 8H2O -> HTcO4 + 2TcO2 + 15HF}}
References
{{Reflist}}
{{Technetium compounds}}
{{fluorides}}