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Abstract
The alkylation of benzene with benzyl chloride has been investigated over a series of iron-containing mesoporous silicas with different Fe contents. These materials (Fe-HMS- n) have been prepared at room temperature using a route based on hydrogen bonding and self-assembly between neutral primary amine micelles (S 0) and neutral inorganic precursors (I 0). They have been characterized by chemical analysis, BET, XRD, and UV–vis spectroscopy. The mesoporous Fe-containing materials were very active benzylation catalysts with almost 100% selectivity to monoalkylated product and showed excellent stability. The kinetics of the benzene benzylation over this catalyst have been thoroughly investigated. A mechanism in which the reaction could be initiated by an oxidation of benzyl chloride with formation of a charge transfer complex is proposed.
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