Conversion of hydroxycyclohexadienyl radicals of methylated benzenes to cation radicals in acid media. [Electron beams]
Formation of radical cations from the OH adducts of methylated benzenes in acidic aqueous solutions is demonstrated. The radical cation is formed as an intermediate species in the water elimination reaction in which the OH adduct is transformed into the corresponding methylbenzyl radical. The radical cations are also produced in neutral aqueous solution by reacting SO/sub 4//sup -/ radical ions with the methylated benzenes. The cations have two absorption bands, an UV band, 280-300 nm, and a visible band, 430-470 nm, with extinction coefficient of about 6500 and 2000 M/sup -1/ cm/sup -1/, respectively. The formation of the radical cations from the OH adducts depends on the hydrogen ion concentration, k/sub OH adduct+H/sup +// = (1.5 +- 0.5) x 10/sup 9/ M/sup -1/ s/sup -1/. The radical cations decay in acid solution exclusively into the corresponding methylbenzyl radicals.
- Research Organization:
- Risoe National Lab., Denmark
- OSTI ID:
- 7218708
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 81:14; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
ADDUCTS
AQUEOUS SOLUTIONS
AROMATICS
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DISPERSIONS
DURENE
ELECTRON BEAMS
HYDROCARBONS
HYDROXYL RADICALS
LEPTON BEAMS
MESITYLENE
MIXTURES
ORGANIC COMPOUNDS
PARTICLE BEAMS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
SOLUTIONS
TOLUENE
XYLENE-PARA
XYLENES