Chemistry:Octafluoride
An octafluoride is a compound or ion with the formula [M
mR
nF
8]q-
or [M
mR
nF
8]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 [MF
8]q-
with q between 1 and 4 inclusive.
Neutral octafluorides
No electrically neutral octafluorides are currently known to exist, although osmium octafluoride, OsF
8, is theoretically possible. An early report of the synthesis of OsF
8 was much later shown to be a mistaken identification of OsF
6.[1]
Anionic octafluorides
In contrast, many anionic octafluorides are known, such as the octafluorozirconate(IV) ([ZrF
8]4−), octafluorotantalate(V) ([TaF
8]3−), octafluoroniobate(V) ([NbF
8]3−),[1] octafluoromolybdate(VI) ([MoF
8]2−),[1] octafluorotungstate(VI) ([WF
8]2−),[1] octafluororhenate(VII) ([ReF
8]−
),[1] octafluoroiodate(VII) ([IF
8]−
), octafluoroiridate(VII) ([IrF
8]−
),[2] and octafluoroxenate(VI) ([XeF
8]2−) anions.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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. https://www.sciencedirect.com/science/article/abs/pii/S0010854508001355.
- ↑ 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.
 |  |
