Darstellung, spektroskopische Charakterisierung und Kristallstruktur von (CF₃)₂C(F)OH₂⁺Sb₂F₁₁^-

Reactions of Dichloroacetyl Fluoride in Superacidic Media

“…This is consistent with values reported in the literature. [2] The symmetric and antisymmetric CÀ Cl stretching and CCl 2 bending vibrations of the dichloromethyl group as well as the CÀ H stretching and CCH bending vibrations of the salts (5 a, 6) are not affected by the formation of the oxonium species. For the octahedral anion [SbF 6 ] À , more vibrations are observed than expected due to interionic interactions leading to a symmetry distortion.…”

“…After dichloroacetyl fluoride was condensed into the reaction vessel at À 196 °C, the mixture was reacted at À 60 °C for 15 min, and the remaining HF was removed in a dynamic vacuum. Ohemiprotonated species of dichloroacetyl fluoride were obtained according to Equation 1 as hexafluoridoarsenates (1, 3) and hexafluoridoantimonates (2,4) in quantitative yields as colorless solids.…”

“…When ketones are reacted in superacidic media, HF-addition to the carbonyl groups occurs under the formation of an OH group, which is subsequently protonated. [1][2][3][4] In many cases, the protonation was observed, when the alkyl group is substituted with strongly electron-withdrawing atoms, such as perfluorinated alkyl moieties. [2][3][4][5][6][7] Minkwitz investigated hexafluoroacetone in the binary superacidic system HF/SbF 5 and characterized the tertiary oxonium salt [(CF 3 ) 2 C(F)OH 2 ][Sb 2 F 11 ], which was formed by protonation of the intermediate α-fluoroalcohol.…”

“…[1][2][3][4] In many cases, the protonation was observed, when the alkyl group is substituted with strongly electron-withdrawing atoms, such as perfluorinated alkyl moieties. [2][3][4][5][6][7] Minkwitz investigated hexafluoroacetone in the binary superacidic system HF/SbF 5 and characterized the tertiary oxonium salt [(CF 3 ) 2 C(F)OH 2 ][Sb 2 F 11 ], which was formed by protonation of the intermediate α-fluoroalcohol. [2] The simplest case is COF 2 , to which HF is added in the superacidic media forming CF 3 OH that is subsequently protonated to [CF 3 OH 2 ][SbF 6 ].…”

“…[2][3][4][5][6][7] Minkwitz investigated hexafluoroacetone in the binary superacidic system HF/SbF 5 and characterized the tertiary oxonium salt [(CF 3 ) 2 C(F)OH 2 ][Sb 2 F 11 ], which was formed by protonation of the intermediate α-fluoroalcohol. [2] The simplest case is COF 2 , to which HF is added in the superacidic media forming CF 3 OH that is subsequently protonated to [CF 3 OH 2 ][SbF 6 ]. [3,4] In previous studies of our group, monoprotonated species of chloroacetyl fluoride and fluoroacetyl fluoride were isolated and characterized, but no oxonium ions were observed.…”