Abstract
One oxovanadium(IV) complex containing an (L)-phenylalanine derived Schiff base ligand has been synthesized and characterized by UV Vis, IR and ESI mass spectrometry. When this complex was kept in methanol for crystallization, brown crystals were obtained. Crystal structure analysis revealed that the original complex crystallized into a new complex. The vanadium(IV) center in the original complex was oxidized to a vanadium(V) center in the new complex. The original complex is shown to be an efficient catalyst for the cycloaddition reaction of CO2 with epoxides to form cyclic carbonates, with up to 99% conversion.
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