Octafluoride
An octafluoride is a compound or ion with the formula [MmRnF8]q− or [MmRnF8]q+, where n, m and q are independent variables and R any substituent and M is a central element (often a metal). All of the examples listed below are [MF8]q− with q between 1 and 4 inclusive.
Neutral octafluorides[edit]
No electrically neutral octafluorides are currently known to exist, although osmium octafluoride, OsF8, is theoretically possible. An early report of the synthesis of OsF8 was much later shown to be a mistaken identification of OsF6.[1]
Anionic octafluorides[edit]
In contrast, many anionic octafluorides are known, such as the octafluorozirconate(IV) ([ZrF8]4−), octafluorotantalate(V) ([TaF8]3−), octafluoroniobate(V) ([NbF8]3−),[1] octafluoromolybdate(VI) ([MoF8]2−),[1] octafluorotungstate(VI) ([WF8]2−),[1] octafluororhenate(VII) ([ReF8]−),[1] octafluoroiodate(VII) ([IF8]−), octafluoroiridate(VII) ([IrF8]−),[2] and octafluoroxenate(VI) ([XeF8]2−) anions.
References[edit]
- ^ a b c d e 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.
- ^ Jianyan Lin, Ziyuan Zhao, Chunyu Liu, Jing Zhang, Xin Du, Guochun Yang, and Yanming Ma (March 13, 2019). "IrF8 Molecular Crystal under High Pressure". J. Am. Chem. Soc. 141 (13): 5409–5414. doi:10.1021/jacs.9b00069. PMID 30864432. S2CID 76664353.
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