- Reaction of chlorine dioxide with phenol
-
The kinetics of phenol oxidation with chlorine dioxide in different solvents (2-methylpropan-1-ol, ethanol, 1,4-dioxane, acetone, acetonitrile, ethyl acetate, dichloromethane, heptane, tetrachloromethane, water) was studied by spectrophotometry. In all solvents indicated, the reaction rate is described by an equation of the second order w = k[PhOH] ? [ClO2]. The rate constants were measured (at 10-60°C), and the activation parameters of oxidation were determined. The reaction rate constant depends on the solvent nature. The oxidation products are a mixture of p-benzoquinone, 2-chloro-p-benzoquinone, and diphenoquinone.
- Ganiev,Suvorkina,Kabal'nova
-
p. 1123 - 1128
(2007/10/03)
-
- Synthesis, characterization, and reactivity of vanadium(V) complexes containing coordinated peroxide and histidine - A model for the active site of enzyme bromoperoxidase
-
Vanadium(V) complexes of the type A[VO(O2)2(HiSt)] (A=H+ or NH4+; Hist=histidine) and [DmpzH][VO(O2)2(Dmpz)] (Dmpz=3,5-dimethylpyrazole) have been synthesized from the reactions of V2O5 or NH4VO3 with H2O2 in the presence of histidine or 3,5-dimethylpyrazole. The complexes have been characterised by elemental analyses, IR, 1H, 13C and 51V NMR and electronic spectroscopic studies. Histidine has been shown to coordinate to vanadium centre through its imidazole nitrogen. Bromination of acetanilide by H[VO(O2)(Hist)] and oxidising capability of [DmpzH][VO(O2)2(Dmpz)] are also reported.
- Mukherjee,Ganguly,Bhattacharjee
-
p. 471 - 474
(2007/10/03)
-