Oxidation with the 'O-2-H2O2-VO3--pyrazine-2-carboxylic acid' reagent .6. Oxidation of n-heptane and cyclochexane. Direct determination of alkyl hydroperoxides by gas-liquid chromatography

n-Heptane is readily oxidized in acetonitrile under the action of H2O2 with a 'vanadate anion-pyrazine-2-carboxyiic acid' system as the catalyst in air to form isomeric heptyl hydroperoxides (detected by GLC) along with isomeric heptanols and heptanones. Heptyl hydroperoxides slowly decompose at low temperature yielding the corresponding alcohols and ketones (aldehyde). The values of the parameter of the relative normalized reactivity of the H atoms at the carbon atoms in positions 1, 2, 3, and 4 depend on the reaction time and concentrations of the reagents. The value of the parameter of selectivity C(1) : C(2) : C(3) : C(4) varies in the range from 1.0 : 2.8 : 2.9 : 1.8 to 1.0 : 5.6 : 5.9 : 5.3. The low selectivity of the reaction shows that the key role is played by the attack of highly reactive radical particles on the C-H bond of the alkane molecule.46474975

Methyltrioxorhenium catalyzed oxidation of saturated and aromatic hydrocarbons by H2O2 in air

Alkanes (cyclohexane, cyclooctane, n-heptane) and aromatic compounds (benzene, toluene, and ethylbenzene) are oxidized by anhydrous H2O2 in MeCN in air in the presence of catalytic amounts of MTO. The reaction is accelerated by addition of pyrazine-2-carboxylic acid. Alkanes give alkyl hydroperoxides as main products, as well as alcohols and ketones. Arenes yield predominantly phenols. Copyright (C) 1996 Elsevier Science Ltd37366487649

Homogeneous Catalytic Oxidation of Olefins with Hydrogen Peroxide in the Presence of a Manganese-Substituted Polyoxomolybdate

[PMo11Mn(H2O)O-39](5-) is used as catalyst in the homogeneous oxidation of cis-cyclooctene, cyclohexene, styrene, and geraniol with H2O2 in acetonitrile. Oxidation of cis-cyclooctene gives only cyclooctene oxide; cyclohexene-1,2-diol is the main product for cyclohexene; styrene is preferentially oxidized to benzaldehyde; a TOF almost as high as 28800 h(-1) is reached for geraniol oxidation