Schmidt Anna-Corina, Hermsen Marko, Rominger Frank, Dehn Richard, Teles Joaquim Henrique, Schäfer Ansgar, Trapp Oliver, Schaub Thomas
Catalysis Research Laboratory (CaRLa) , Im Neuenheimer Feld 584, 69120 Heidelberg, Germany.
BASF SE , Quantum Chemistry & Molecular Simulation Catalysis, Carl-Bosch-Straße 38, 67056 Ludwigshafen, Germany.
Inorg Chem. 2017 Feb 6;56(3):1319-1332. doi: 10.1021/acs.inorgchem.6b02322. Epub 2017 Jan 24.
Several vanadium(V) complexes with either dipic-based or Schiff base ligands were synthesized. The complexes were fully characterized by elemental analysis, IR, H, C, and V NMR spectroscopy, as well as mass spectrometry and X-ray diffraction. Furthermore, they were tested toward their catalytic deperoxidation behavior and a significant difference between 4-heptyl hydroperoxide and cyclohexyl hydroperoxide was observed. In the case of 4-heptyl hydroperoxide, the selectivity toward the corresponding ketone was higher than with cyclohexyl hydroperoxide. DFT calculations performed on the vanadium complex showed that selective decomposition of secondary hydroperoxides with vanadium(V) to yield the corresponding ketone and water is indeed energetically feasible. The computed catalytic path, involving cleavage of the O-O bond, hydrogen transfer, release of ketone/water, and finally addition of hydroperoxide, can proceed without the generation of radical species.
