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Hydrogen/Deuterium‐Exchange Reactions of Methane with Aromatics and Cyclohexane Catalyzed by a Nanoscopic Aluminum Chlorofluoride
Author(s) -
Calvo Beatriz,
Braun Thomas,
Kemnitz Erhard
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701327
Subject(s) - cyclohexane , chemistry , methane , catalysis , benzene , isotopologue , hydrogen , deuterium , inorganic chemistry , heterogeneous catalysis , electrophile , photochemistry , organic chemistry , molecule , physics , quantum mechanics
H/D‐exchange reactions between methane and deuterated solvents such as [D 6 ]benzene and [D 12 ]cyclohexane were heterogeneously catalyzed by nanoscopic aluminum chlorofluoride (ACF=AlCl x F 3− x , x ≈0.05–0.3) under very mild conditions. 13 C NMR spectroscopy experiments at labeled methane revealed the formation of all isotopologues. AlCl 3 , AlBr 3 , HS‐AlF 3 , γ‐Al 2 O 3 , and γ‐Al 2 O 3 preheated at 700 °C did not show any H/D‐exchange reaction of methane or [D 6 ]benzene. Mechanistically, electrophilic activation of methane was suggested at the ACF surface.