Mechanism of benzophenone ketyl radical formation in acid alcohols studied by pulse-radiolysis and rigid-matrix techniques. [Gamma rays]

Journal Article · Thu Oct 02 04:00:00 EDT 1980 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100457a018· OSTI ID:6873484

Hoshino, M ^[1]; Arai, S; Imamura, M; Ikehara, K; Hama, Y

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1. Inst. of Physical and Chemical Research, Saitama, Japan

The mechanism of the benzophenone ketyl radical formation in acid methanol, ethanol, and 2-propanol was studied by using pulse-radiolysis and rigid-matrix techniques. When a 0.1 M ethanol solution of benzophenone containing hydrogen chloride (1.2 M) was irradiated at 77 K by ..gamma.. rays from /sup 60/Co, the absorption spectrum of the trapped intermediates was ascribed solely to benzophenone ketyl radicals. The pulse-radiolysis study of the solution at 100 K revealed that the ketyl radicals are produced by protonation of presolvated benzophenone anion radicals. At 153 K, the ketyl radicals were observed to be produced also by hydrogen-atom transfer from CH/sub 3/CHOH and CH/sub 3/CH(OH)CH/sub 3/ to benzophenone; the temperature dependence of the transfer rate constant was studied.

• OSTI ID: 6873484
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 84:20; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTROSCOPY
ALCOHOLS
BENZOPHENONE
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ETHANOL
GAMMA RADIATION
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
IONIZING RADIATIONS
IRRADIATION
KETONES
LOW TEMPERATURE
METHANOL
ORGANIC COMPOUNDS
PROPANOLS
PULSED IRRADIATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOLYSIS
SPECTROSCOPY
TEMPERATURE DEPENDENCE