Catalytic potentials of homodioxo-bimetallic dihydrazone complexes of uranium and molybdenum in a homogeneous oxidation of alkenes

The catalytic potentials of dioxomolybdenum(VI) and dioxouranium(VI) homobimetallic bis-ONO tridentate (2-hydroxy-1-benzylidene)malonyl-, succinyl-, and terephthalo-dihydrazone complexes were studied in homogeneous oxidation processes of various aliphatic and cyclic alkenes using aqueous H2O2 or TBHP (tert-butyl hydroperoxide) as a terminal oxidant. The catalytic potentiality is quantitative and highly selective to afford the corresponding oxide product with (MoO2)-O-VI complexes which is 5 times more than that with (UO2)-O-VI complexes using aqueous H2O2 or TBHP. Effect of various solvents and temperatures was investigated in the oxidation of 1,2-cyclooctene catalyzed by (MoO2)-O-VI complexes using aqueous H2O2 results that the most favored solvent is acetonitrile at an optimal temperature is 70 A degrees C. The mechanistic pathway was tentatively described and discussed. [GRAPHICS] .