Osmium octafluoride

Osmium octafluoride
	; Approximate geometry predicted computationally
Names
	IUPAC name Octafluoroosmium
	Other names Osmium(VIII) fluoride
Identifiers
CAS Number	18432-81-0;
3D model (JSmol)	Interactive image;
PubChem CID	57496620;
	InChI InChI=1S/8FH.Os/h8*1H;/q;;;;;;;;+8/p-8 Key: ZTSGTWBSMBQRNE-UHFFFAOYSA-F;
	SMILES F[Os](F)(F)(F)(F)(F)(F)F;
Properties
Chemical formula	OsF8
Molar mass	342.22 g·mol−1
Structure
Crystal structure	C2/c (4 GPa); R3 (240 GPa)
Related compounds
Related compounds	Xenon octafluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Osmium octafluoride is an inorganic chemical compound of osmium metal and fluorine with the chemical formula Os F₈.^[3]^[4] Some sources consider it to be a still hypothetical compound.^[5] An early report of the synthesis of OsF₈ was much later shown to be a mistaken identification of OsF₆.^[6] Theoretical analysis indicates OsF₈ would have an approximately square antiprismatic molecular geometry.^[7]

Potential synthesis

Rapid cooling of fluorine and osmium reaction products:^[8]

Os + 4 F₂ → OsF₈

^ "Octafluoroosmium".
^ Lin, Jianyan; Du, Xin; Rahm, Martin; Yu, Hong; Xu, Haiyang; Yang, Guochun (25 March 2020). "Exploring the Limits of Transition-Metal Fluorination at High Pressures". Angewandte Chemie International Edition. 59 (23): 9155–9162. doi:10.1002/anie.202002339. eISSN 1521-3773. ISSN 1433-7851. PMID 32150319. S2CID 212639781.
^ Routledge German Dictionary of Chemistry and Chemical Technology Worterbuch Chemie und Chemische Technik: Vol 1: German-English. Routledge. 17 June 2014. p. 481. ISBN 978-1-136-76231-4. Retrieved 30 March 2023.
^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3247. ISBN 978-0-412-30120-9. Retrieved 30 March 2023.
^ Haupt, Axel (22 March 2021). Organic and Inorganic Fluorine Chemistry: Methods and Applications. Walter de Gruyter GmbH & Co KG. p. 258. ISBN 978-3-11-065933-7. Retrieved 30 March 2023.
^ Riedel, S.; Kaupp, M. (30 Jul 2009). "The highest oxidation states of the transition metal elements". Coordination Chemistry Reviews. 253 (5–6): 606–624. doi:10.1016/j.ccr.2008.07.014.
^ Riedel, Sebastian; Kaupp, Martin (2006). "Where Is the Limit of Highly Fluorinated High-Oxidation-State Osmium Species?". Inorg. Chem. 45 (26): 10497–10502. doi:10.1021/ic061054y. PMID 17173405.
^ Satya, Prakash (2013). Advanced Chemistry of Rare Elements. S. Chand Publishing. p. 612. ISBN 978-81-219-4254-6. Retrieved 30 March 2023.

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