Insights on the Lewis Superacid Al(OTeF5)3: Solvent Adducts,Characterization and Properties** |
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| Authors: | Kurt F Hoffmann Dr Anja Wiesner Dr Simon Steinhauer Prof Dr Sebastian Riedel |
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| Institution: | Fachbereich für Biologie, Chemie, Pharmazie, Institut für Chemie und Biochemie – Anorganische Chemie, Fabeckstraße 34/36, 14195 Berlin, Germany |
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| Abstract: | Preparation and characterization of the dimeric Lewis superacid Al(OTeF5)3]2 and various solvent adducts is presented. The latter range from thermally stable adducts to highly reactive, weakly bound species. DFT calculations on the ligand affinity of these Lewis acids were performed in order to rank their remaining Lewis acidity. An experimental proof of the Lewis acidity is provided by the reaction of solvent-adducts of Al(OTeF5)3 with PPh4]SbF6] and OPEt3, respectively. Furthermore, their reactivity towards chloride and pentafluoroorthotellurate salts as well as (CH3)3SiCl and (CH3)3SiF is shown. This includes the formation of the dianion Al(OTeF5)5]2−. |
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| Keywords: | aluminum coordination chemistry fluorine chemistry Lewis superacids pentafluoroorthotellurate |
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