عنوان مجله
|
JOURNAL OF COORDINATION CHEMISTRY
|
چکیده
|
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.
|