Studies were carried out to determine the
activity of complexes of the essential amino acids DL-Lysine and L-Methionine with heavy
metals in the oxidation of cyclohexene with tert-butylhydroperoxide
in toluene at 80°C. All complexes were prepared through interaction of metal ions
and DL-Lysine and L-Methionine at room temperature in aqueous
solutions. Only the complexes of Mo and W were obtained from acidic aqueous solution.
These complexes were characterized by FT-IR, Moessbauer spectroscopy and EPR analysis.
The products of the oxidation reactions were identified by GC/MS analysis. The complexes
of Mo and V showed the best activity in the epoxidation reaction of cyclohexene
in comparison with other complexes, such as Ni, Mn, Zn, Co, Cu, Cr, Fe and W. Using
semi-empirical quantum-chemistry methods, the full energy of the Mo complexes was
calculated and their probable structure is presented.
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