Hydrogen sesquioxide

B.H.J. Bielski et al., Absorption spectra and kinetics of hydrogen sesquioxide and the perhydroxyl radical. J. Phys. Chem. 72, 3836-3841 (1968)... 

Va.na.dlum(III) Oxide. Vanadium(III) oxide (vanadium sesquioxide, V2O2) is a black soHd, having the comndum (AI2O2) stmcture. It can be prepared by reduction of the pentoxide by hydrogen or carbon. Air oxidation proceeds slowly at ambient temperatures, but oxidation by chlorine at elevated temperatures to give VOCl and V20 is rapid. 

Figure 3. Moisture concentration (ppm H2O) in the hydrogen carrier gas as a function of time during the preparation of the plutonium sesquioxide sample by hydrogen reduction at 2250 K.

A mixture of anhydrous hydrogen fluoride and 60% argon is passed over yttrium sesquioxide (Y203) at 700 °C for 16 h. The oxide is contained in a platinum boat, and the inconel furnace tube is also lined with platinum. 

Ammonium hydrogen fluoride (NH4HF2) is useful for converting pure oxides or hydroxides to the corresponding fluorides. The reaction occurs through the formation of a double fluoride. For example, with vanadium sesquioxide the following reactions occur ... 

Oxidation of thiophene and its derivatives was studied using hydrogen peroxide (H2O2), t-butyl-hydroperoxide and Ti-Beta redox molecular sieve as selective oxidation catalysts. A new reaction pathway was discovered and investigated using C-13 NMR, GC, GC-MS, HPLC, ion chromatography, and XANES. The thiophene oxidized to thiophene-sesquioxide [3a,4,7,7a-tetrahydro-4,7-epithiobenzo[b]-thiophene 1,1.8-trioxide] and the sesquioxide oxidized mostly to sulfate. 2-Methyl-thiophene and 2,5 dimethylthiophene also oxidized to sulfate and sulfone products. The Benzothiophene oxidation product was sulfone. This proposed new reaction pathway is different from prior literature, which reported the formation of thiophene 1,1-dioxide (sulfone ) as a stable oxidation product... 

Kj, or the ratios of solution-phase solute concentration and adsorbed-phase concentration were calculated to estimate the relative affinity of the soils for phenolic acids. The Kj values for p-hydroxybenzoic acid, p-coumaric, vanillic, ferulic, and syringic icids were 67, 75, 69, 92 and 376, respectively for a 48-hr equilibration of 0.1 nmol mL phenolic acid solution with a sample of an alfisol preextracted in boiling water. The sorption capacity was greatly reduced by pretreatment of soil samples with sodium acetate-hydrogen peroxide to remove organic matter and metal sesquioxides. 

Arsenic sesquioxide may be prepared by heating arsenic trioxide with hydrogen sulfide ... 

Atomic chlorine is highly reactive, combining slowly with sulphur and red phosphorus, rapidly with copper and chromium sesquioxide. It also can be shown to start the long chains in a mixture of hydrogen and chlorine. 

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