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The reaction between benzyl chloride and acetate ion, generated from several alkali acetates and a series of macrocyclic polyethers was carried out under similar, heterogeneous solid/liquid phase-transfer conditions. The ability of anion activation of several important polyether ligands is compared. The differences of reactivity among the macrocyclic polyethers in the presence of the same cation are reported. Each ligand can be combined with one certain alkali cation to generate the most reactive species. A model of anion activation under phase-transfer condition is discussed.

zeitschrift für naturforschung b

Anionenaktivierung, VI 1  Charakterisierung des anionenaktivierenden Verhaltens makrozyklischer Polyether im Verlauf nukleophiler Substitutionsreaktionen mit heterogener Reaktionsführung / Anion Activation, VI Characterisation of Anion Activation by Macrocyclic Polyethers during Nucleophilic Substitutions under Heterogeneous Conditions