Zur Kristallchemie von Supersäuren: Bildung und Struktur der tiefschmelzenden Addukte SbF₅ · CF₃SO₃H und SbF₅ · 7 HF [1] / Crystal Chemistry of Superacids: Formation and Structure of the Low-Melting Adducts SbF₅ · CF₃SO₃H and SbF₅ · 7 HF [1]

[H(OXeF2)n][AsF6] and [FXeII(OXeIVF2)n][AsF6] (n = 1, 2): Examples of Xenon(IV) Hydroxide Fluoride and Oxide Fluoride Cations and the Crystal Structures of [F3Xe---FH][Sb2F11] and [H5F4][SbF6]·2[F3Xe---FH][Sb2F11]

“…could not be located in the difference map, which was also the case for H 3 F 2 + and H 2 F + . 36 The SbF 6 − anion and fluorine atoms of the H 5 F 4 + cation form a chain structure (Figure 1) that is similar to those of 35 and [H 7 F 6 ][SbF 6 ]. 35 The shortest F---F distance between the SbF 36 and H 2 F + (2.64−2.78 Å) 36 and exhibit the same F---F distance trends.…”

“…Examples in which HF is coordinated to metal centers are well established and have been the subject of a review, 33 to main-group centers are provided by the series of H n+1 F n + (n ≥ 1) acidium ions formed in the superacid medium, HF/SbF 5 . Several acidium ion salts have been proposed for the HF/SbF 5 superacid system based on phase diagrams, 35 36 and [H 7 F 6 ][SbF 6 ] 35 have thus far been isolated and structurally characterized by single-crystal X-ray diffraction.…”

“…Further examples of HF coordination to main-group centers are provided by the series of H n +1 F n + ( n ≥ 1) acidium ions formed in the superacid medium, HF/SbF 5 . Several acidium ion salts have been proposed for the HF/SbF 5 superacid system based on phase diagrams, that is, [H 2 F][Sb 2 F 11 ], [H 3 F 2 ][Sb 2 F 11 ], [H 2 F][SbF 6 ], [H 3 F 2 ][SbF 6 ], [H 4 F 3 ][SbF 6 ], and [H 7 F 6 ][SbF 6 ], but only [H 2 F][Sb 2 F 11 ], [H 3 F 2 ][Sb 2 F 11 ], and [H 7 F 6 ][SbF 6 ] have thus far been isolated and structurally characterized by single-crystal X-ray diffraction.…”

The Protonation of CF3SO3H: Preparation and Characterization of Trifluoromethyldihydroxyoxosulfonium Hexafluoridoantimonate, CF3SO3H2+SbF6–

“…[4a] (2) Indeed, Mootz et al described a reaction of triflic acid with SbF 5 that forms an adduct, which has been identified by a single-crystal structure. [6] The acidic cationic species of the triflate superacidic system has not yet been identified.…”

“…[5a,7b] For the SbF 6 -anion with ideal octahedral symmetry, two vibrations in the infrared and three vibrations in the Raman spectra with mutual exclusions are expected. As found in the crystal structure, the SbF 6 -is at least distorted to D 4h symmetry for which five vibrations in the infrared and five vibrations in the Raman spectrum with mutual exclusions are expected. This lowered symmetry suffices to explain the number of observed vibrations.…”