Catalytic oxidation of internal and terminal alkenes by oxidoperoxidomolybdenum(VI) and dioxidomolybdenum(VI) complexes

Dioxidomolybdenum(VI) Complexes of Tripodal Tetradentate Ligands for Catalytic Oxygen Atom Transfer between Benzoin and Dimethyl Sulfoxide and for Oxidation of Pyrogallol

“…We have recently explored the catalytic role of cis ‐[Mo VI O 2 ] 2+ complexes with ONO/ONS donor ligands in the oxidation and oxidative bromination of various organic substrates mediated by H 2 O 2 /NaHCO 3 . Most of these reactions are thought to proceed via an oxidoperoxido intermediate, the formation of which has been substantiated by UV/Vis spectroscopic evidence as well as single‐crystal X‐ray structures in some cases . In the present study, we have performed a detailed kinetic study and deduced the rate equation for oxygen atom transfer between DMSO and benzoin catalyzed by cis ‐[MoO 2 ] 2+ complexes of tripodal tetradentate ligands through high‐performance liquid chromatography.…”

Synthesis, characterization, DNA binding/cleavage, cytotoxic, apoptotic, and antibacterial activities of V(IV), Mo(VI), and Ru(II) complexes containing a bioactive ONS‐donor chelating agent

“…In all complexes, upon coordination to the metal ion, the ν(OH) band disappeared, the bands due to ν(CN) is shifted to lower frequency, while ν(C–O) and ν(N–N) bands are shifted to higher wavenumbers. [ 21,53 ] Also, the band due to thione ν(CS) disappeared followed by appearance of new bands in 717–767 cm −1 region due to formation of thiolate group ν(C–S). [ 20,21,29,54 ] This concludes that the ligand is coordinated to the metal center through azomethine nitrogen, deprotonated phenolate oxygen, and thiolate sulfur in a bi‐negative tridentate manner.…”

Magnetically Reusable MnFe2O4 Nanoparticles Modified with Oxo‐Peroxo Mo (VI) Schiff‐Base Complexes: A High Efficiency Catalyst for Olefin Epoxidation under Solvent‐Free Conditions

“…The C=N stretching in MP‐NSA appeared at 1635 cm −1 ( Figure Ac ), while in MP‐MoOO 2 , this band shifts to lower frequency and appears at 1622 cm −1 . The two adjacent bands at 946 and 912 cm −1 are characteristic of the presence of MoO(O 2 ) groups and lower intensity vibration at 832 cm −1 assined to O–O intra stretching, ( Figure Ad ).…”

“…Therefore, olefin epoxidation using various catalysts has become an important chemical reaction. The use of molybdenum (VI) Schiff base complexes as catalysts for alkene epoxidation is largely used due to the significant advantages of these catalysts such as high stability, high efficiency and commercial availability …”