Claudia Hirsch

The Crystal Structures of Peroxonium Hexafluoroantimonate H3O2SbF6 and Bis(dihydrogenperoxo)hydrogen Hexafluoroantimonate H5O4SbF6

Protonated hydrogen peroxide is produced from the reaction of antimony pentafluoride with bis(trimethylsilyl)peroxide in the presence of hydrogen fluoride. Depending on the stoichiometry of the reaction mixture, the compounds H3 O2 SbF6 and H5 O4 SbF6 are formed, which are stable up to room temperature and have been characterized by X-ray crystallography. The structure of the H3 O2+ ion is shown on the right.

Reaktionen von Oxalsäure in den supersauren Systemen HF/MF5 (M = As, Sb), Kristallstrukturen von HO(O)CC(OH)2+SbF6– und (HO)2CC(OH)22+(SbF6–)2 · 4 H2O

Die Reaktion von Oxalsaure im supersauren System HF/SbF5 fuhrt je nach Reaktionstemperatur zu unterschiedlichen Ergebnissen. So erfolgt bei –75 °C Protonierung der Oxalsaure zu HO(O)CC(OH)+SbF6– (1), wahrend bei einer Temperaturerhohung auf –40 °C Salze der Zusammensetzung (HO)2CC(OH)22+(SbF6–)2 · 4 H2O (2) entstehen. Die Salze werden durch Schwingungsspektroskopie und Kristallstrukturanalysen charakterisiert. Reactions of Oxalic Acid in the Superacidic Systems HF/MF5 (M = As, Sb), Crystal Structures of HO(O)CC(OH)2+SbF6– and (HO)2CC(OH)22+(SbF6–)2 · 4 H2O The reaction of oxalic acid in the superacidic system HF/SbF5 leads dependent on the reaction temperature to different results. At –75 °C monoprotonation to HO(O)CC(OH)2+SbF6– (1) occurs, whereas at –40 °C a salt of the composition (HO)2CC(OH)22+(SbF6–)2 · 4 H2O (2) is formed. The salts are characterised by vibrational spectroscopy and their crystal structures.

Kristallstruktur von Hydrogenoxonium-Hexachloroantimonat-Bisacetonitril / Crystal Structure of Hydrogenoxonium Hexachloroantimonate-Bisacetonitrile

The formation of hydrogen bonds to acetonitrile molecules lends stability to the hitherto unknown hydrogenoxonium hexachloroantimonate H3O+SbCl6- . The structure of H3O+SbCl6- · 2 CH3CN was determined on a single crystal. It crystallises in the orthorhombic space group Pmn2( 1) (Nr. 31) with Z = 2, a = 1 12,7( 1 ),b = 988,8( 1) and c = 1036,5( 1) pm.