Abstract
AbstractThis paper demonstrates the catalytic activity of ionic liquids with an 1‐alkyl‐3‐methylimidazolium cation ([Rmim][X]) in the oxidation of ethylbenzene as a model hydrocarbon. The interaction between ionic liquids and N‐hydroxyphthalimide (NHPI) were examinated with or without Co(II). The activity of the studied ionic liquids and selected tetraalkylammonium salts ([R4N][X]) is compared. The influence of the structure of the alkyl substituents [R] and anions (in which [X]=[Cl], [Br], or [I]) on the reaction course was determined. The interaction between NHPI and the selected ionic liquids was proven using 1H NMR. It was shown that the formation of hydrogen bonds between the hydrogen atom in the −NOH group in NHPI and the anion [X] in [Rmim][X] influenced the rate of the oxidation reaction by accelerating the formation of the N‐oxyl radical responsible for the NHPI activity.
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