Zeolite Shape-Selectivity in the gem-Methylation of Aromatic Hydrocarbons


  • This work is supported by the Fund for Scientific Research—Flanders (FWO) and the Research Board of Ghent University.


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A glove for the purpose: The kind of olefins obtained from methanol in zeolites is strongly dependent on specific combinations of the intermediate organic hydrocarbon-pool species and zeolite topology (see picture). If the cage is too large, neutral species are favored over reactive cations. If the cage is too small, transition-state-shape selectivity poses severe limitations on the reactivity of bulkier species.