Abstract

A biomimetic tris-imidazole ligand, herein called L3imid, has been synthesized. The complexes formed by its association with Mn(II) have been evaluated for catalytic alkene epoxidation with H2O2. The catalytic efficiency of Mn(II)/L3imid system was shown to be switched on by ammonium acetate, with remarkable effectiveness and selectivity towards epoxides. The incorporation of the biomimetic ligand L3imid which combines structural features as Schiff base imine-groups and imidazole rings is considered to be related with the enhanced catalytic activity of the Mn(II)/L3imid system.

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