A novel tridentate Schiff base dioxo-molybdenum(VI) complex: Synthesis, crystal structure and catalytic performance in green oxidation of sulfides by urea hydrogen peroxide

A new dioxo-molybdenum(VI) complex [MoO2(L)(CH3OH)] has been synthesized, using 2-[(2-hydroxypropylimino)methyl]phenol as tridentate ONO donor Schiff base ligand (H2L) and MoO2(acac)2. A monoclinic space group P21/c was determined by X-ray crystallography from single-crystal data of this complex. The high catalytic activity of this new Schiff base complex has been observed in the oxidation of various sulfides by urea hydrogen peroxide in ethanol affording sulfoxides and sulfones using different molar ratio of oxidant/sulfide in high/excellent yields and selectivity under mild and eco-friendly conditions. The relative high stability and desired turnover numbers have been observed for this Mo-catalyst in the oxidation reactions.

A new dioxo-molybdenum(VI) complex [MoO2(L)(CH3OH)] has been synthesized using a tridentate ONO Schiff base ligand (H2L). The X-ray crystallography showed a monoclinic space group P21/c for this complex. The high catalytic activity of this Schiff base complex has been observed in the oxidation of sulfides by urea hydrogen peroxide in ethanol with high/excellent yields and selectivity.Figure optionsDownload as PowerPoint slide