Osmium heptafluoride

Osmium heptafluoride
Names
	Other names Osmium(VII) fluoride
Identifiers
CAS Number	16949-69-2;
3D model (JSmol)	Interactive image;
	InChI InChI=1S/7FH.Os/h7*1H;/q;;;;;;;+7/p-7 Key: PYLQBEQBIUJFFB-UHFFFAOYSA-G;
	SMILES F[Os](F)(F)(F)(F)(F)F;
Properties
Chemical formula	F7Os
Molar mass	323.22 g·mol−1
Structure
Crystal structure	Pentagonal bipiramidal (calculated)
Related compounds
Related compounds	Rhenium heptafluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Osmium heptafluoride is a possible inorganic chemical compound of osmium metal and fluorine with the chemical formula OsF
₇.^[2]^[3] It was first reported in 1966 by the reaction of fluorine and osmium at 600 °C and 400 atm,^[4] but no purported synthesis could be reproduced in 2006, giving only osmium hexafluoride instead.^[5]

Physical properties

If it exists, osmium(VII) fluoride is supposedly a bluish-yellow hygroscopic substance, extremely unstable.^[6] The compound starts decomposing at –100 °C. It should be stored in a nickel vessel at the temperature of liquid nitrogen.

Chemical properties

Osmium heptafluoride decomposes to osmium hexafluoride when slightly heated:

2OsF₇ → 2OsF₆ + F₂

References

^ Bayerische Julius-Maximilians-Universität Würzburg (2006). The Highest Oxidation States of the 5d Transition Metals: a Quantum-Chemical Study (PDF) (Report). Chemical Society. Retrieved 2011-06-20.
^ "Osmium heptafluoride". WebElements. Retrieved 19 April 2023.
^ Hawkins, Donald T. (6 December 2012). Binary Fluorides: Free Molecular Structures and Force Fields A Bibliography (1957–1975). Springer Science & Business Media. p. 42. ISBN 978-1-4684-6147-3. Retrieved 19 April 2023.
^ Glemser, Oskar; Roesky, Herbert W.; Hellberg, Karl-Heinz; Werther, Heinz-Ulrich (1966). "Darstellung und Eigenschaften von Osmiumheptafluorid". Chemische Berichte. 99 (8). Wiley: 2652–2662. doi:10.1002/cber.19660990834. ISSN 0009-2940.
^ Shorafa, Hashem; Seppelt, Konrad (1 September 2006). "Osmium(VII) Fluorine Compounds". Inorganic Chemistry. 45 (19): 7929–7934. doi:10.1021/ic0608290. PMID 16961386.
^ Edwards, A. J. (1 November 1983). "Structures of the binary fluorides". Advances in Inorganic Chemistry. 27. Academic Press: 108. ISBN 9780080578767. Retrieved 19 April 2023.

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[1] Bayerische Julius-Maximilians-Universität Würzburg (2006). The Highest Oxidation States of the 5d Transition Metals: a Quantum-Chemical Study (PDF) (Report). Chemical Society. Retrieved 2011-06-20.

[2] "Osmium heptafluoride". WebElements. Retrieved 19 April 2023.

[3] Hawkins, Donald T. (6 December 2012). Binary Fluorides: Free Molecular Structures and Force Fields A Bibliography (1957–1975). Springer Science & Business Media. p. 42. ISBN 978-1-4684-6147-3. Retrieved 19 April 2023.

[4] Glemser, Oskar; Roesky, Herbert W.; Hellberg, Karl-Heinz; Werther, Heinz-Ulrich (1966). "Darstellung und Eigenschaften von Osmiumheptafluorid". Chemische Berichte. 99 (8). Wiley: 2652–2662. doi:10.1002/cber.19660990834. ISSN 0009-2940.

[5] Shorafa, Hashem; Seppelt, Konrad (1 September 2006). "Osmium(VII) Fluorine Compounds". Inorganic Chemistry. 45 (19): 7929–7934. doi:10.1021/ic0608290. PMID 16961386.

[6] Edwards, A. J. (1 November 1983). "Structures of the binary fluorides". Advances in Inorganic Chemistry. 27. Academic Press: 108. ISBN 9780080578767. Retrieved 19 April 2023.

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