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- W2008135483 abstract "The ability of binary fluorides (MFx, x = 1 - 7) to donate fluoride ions to the Lewis acids AsF5 and SbF5, i.e., the synthesis and characterization of solids with emphasis on structural data, are comprehensively reviewed herein. If the starting binary fluoride compound MFx does not exist, a different approach must be taken to synthesize the corresponding MFx⋅nPnF6 compound. In addition to the solid compounds isolated in MFx/AsF5 and MFx/SbF5 systems, several other examples are given where Mn+ was detected in HF-AsF5 or HF-SbF5 solutions, but the corresponding salts were never isolated in the condensed state. AsF5 and SbF5 are strong Lewis acids and strong fluoride ion acceptors. In MFx/PnF5 systems (n = 1-7; Pn = As, Sb), AsF5 forms only [AsF6]− salts, whereas reactions with SbF5 give oligomeric [Sb2F11]− or [Sb3F16]− salts in addition to [SbF6]−. Most reactions in MFx/PnF5 systems occurred by direct interaction of the reactants with/without the use of a suitable solvent (anhydrous HF, SO2, etc.). Liquid anhydrous HF (aHF) proved to be the most suitable solvent. When performing reactions with AsF5, even at low concentrations, in aHF, the oxidizing power of AsF5 should be taken into account. SbF5 is completely ionized in HF solutions in the form of [SbF6]−, [Sb2F11]−, [Sb3F16]−, and/or [Sb4F21]−, depending on the concentration. Attempts to grow single crystals MFx⋅nPnF6 from corresponding saturated solutions often resulted in HF-containing [PnF6]− salts. Examples of such compounds are also included in this work. In addition, a brief overview of [PnF6]−, [Pn2F11]− and [Pn3F16]− salts (Pn = As, Sb) with homopolyatomic cations [Mx]n+ is given." @default.
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- W2008135483 date "1978-09-01" @default.
- W2008135483 modified "2023-10-16" @default.
- W2008135483 title "The adduct VF5.SbF5" @default.
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- W2008135483 doi "https://doi.org/10.1016/s0022-1139(00)81590-0" @default.
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