Thermal decomposition of methanol in the sonolysis of methanol-water mixtures. Spin-trapping evidence for isotope exchange reactions
The spin trap 3,5-dibromo-4-nitrosobenzenesulfonate was used to monitor the yield of free radicals produced during sonolysis of water-methanol mixtures. Methyl radicals and CH/sub 2/OH radicals were observed as well as the isotopically mixed radicals CH/sub 2/D and CHD/sub 2/ when CH/sub 3/OD:D/sub 2/O mixtures were studied. The results clearly show that thermal decomposition of methanol to methyl radicals occurs in the gas phase. The methyl radical yield rises sharply at very low concentrations of methanol, reaches a maximum at 5 mol dm/sup -3/ in water and decreases to a smaller value in methanol. The yield of methyl radicals as a function of methanol concentration is discussed in terms of the different factors influencing the sonochemistry.
- Research Organization:
- National Institutes of Health, Bethesda, MD
- OSTI ID:
- 5774753
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 91:23
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DEUTERIUM
ISOTOPIC EXCHANGE
DEUTERIUM COMPOUNDS
DECOMPOSITION
METHANOL
EXPERIMENTAL DATA
METHYL RADICALS
MIXTURES
QUANTITY RATIO
SOUND WAVES
WATER
ALCOHOLS
ALKYL RADICALS
CHEMICAL REACTIONS
DATA
DISPERSIONS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXY COMPOUNDS
INFORMATION
ISOTOPES
LIGHT NUCLEI
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
RADICALS
STABLE ISOTOPES
400202* - Isotope Effects
Isotope Exchange
& Isotope Separation