Title:
An Amorphous Teflate Doped Aluminium Chlorofluoride: A Solid Lewis‐Superacid for the Dehydrofluorination of Fluoroalkanes
Author(s):
Bui, Minh; Hoffmann, Kurt F.; Braun, Thomas; Riedel, Sebastian; Heinekamp, Christian; Scheurell, Kerstin; Scholz, Gudrun; Stawski, Tomasz M.; Emmerling, Franziska
Year of publication:
2023
Available Date:
2023-04-21T09:29:07Z
Abstract:
An anion‐doped aluminium chlorofluoride AlCl0.1F2.8(OTeF5)0.1 (ACF‐teflate) was synthesized. The material contains pentafluoroorthotellurate (teflate) groups, which mimic fluoride ions electronically, but are sterically more demanding. They are embedded into the amorphous structure. The latter was studied by PDF analysis, EXAFS data and MAS NMR spectroscopy. The mesoporous powder is a Lewis superacid, and ATR‐IR spectra of adsorbed CD3CN reveal a blue‐shift of the adsorption band by 73 cm−1, which is larger than the shift for SbF5. Remarkably, ACF‐teflate catalyzes dehydrofluorination reactions of monofluoroalkanes to yield olefins in C6D6. In these cases, no Friedel‐Crafts products were formed.
Part of Identifier:
e-ISSN (online): 1867-3899
Keywords:
aluminium fluorides
aluminium teflates
C−F activation
Lewis superacids
silanes
DDC-Classification:
540 Chemie und zugeordnete Wissenschaften
Publication Type:
Wissenschaftlicher Artikel
URL of the Original Publication:
DOI of the Original Publication:
Journaltitle:
ChemCatChem
Department/institution:
Biologie, Chemie, Pharmazie
Institut für Chemie und Biochemie