|
Title
|
Synthesis, crystal structure and catalytic activity of an oxo-diperoxo tungsten(VI) complex containing an oxazine ligand for selective oxidation of sulfides
|
|
Type
|
JournalPaper
|
|
Keywords
|
Oxo-diperoxo; tungsten; oxazine ligand; oxidation of sulfides; sulfoxide
|
|
Abstract
|
A novel oxo-diperoxo tungsten(VI) complex, [WO(O2)2(Hphox)], was prepared by reaction of WO3 in H2O2 with an oxazine-type ligand, 2-(20-hydroxylphenyl)oxazine (Hphox). The complex was characterized by FTIR, 1H NMR and elemental analysis. The singlecrystal X-ray diffraction studies revealed a seven-coordinate tungsten center with a distorted octahedral geometry. The [WO(O2)2(Hphox)] complex was applied as a catalyst in efficient and selective oxidation of sulfide to sulfoxide using 30% H2O2 or UHP (urea hydrogen peroxide) as oxidants. This catalyst showed excellent catalytic activities and high selectivities in producing a variety of aryl and alkyl sulfoxides under mild conditions. To get an insight into the mechanisms of oxidation of sulfides, the mechanistic studies were monitored by UV–Vis spectroscopy.
|
|
Researchers
|
Mojtaba Amini (Fifth Researcher), Ali Akbari (Fourth Researcher), Alireza Abbasi (Third Researcher), (Second Researcher), (First Researcher)
|