Octafluoride

An octafluoride is a compound or ion with the formula R_nM_xF₈^y− or R_nM_xF₈^y+, where n, x, and y are independent variables and R any substituent.

Neutral octafluorides

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

In contrast, many anionic octafluorides are known, such as the octafluorozirconate (ZrF₈⁴⁻), octafluorotantalate (TaF₈³⁻), octafluoromolybdate (MoF₈²⁻), octafluorotungstate (WF₈²⁻), octafluororhenate (ReF₈⁻), octafluoroiodate (IF₈⁻), and octafluoroxenate (XeF₈²⁻) anions.[1]

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References

Riedel, S.; Kaupp, M. (2009). "The highest oxidation states of the transition metal elements" (PDF). Coordination Chemistry Reviews. 253 (5–6): 606–624. doi:10.1016/j.ccr.2008.07.014.

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[fluorides-1] Riedel, S.; Kaupp, M. (2009). "The highest oxidation states of the transition metal elements" (PDF). Coordination Chemistry Reviews. 253 (5–6): 606–624. doi:10.1016/j.ccr.2008.07.014.