Isotope effect in reactions of CH3 and CD3 radicals in glassy solutions of CH3OH and C2H5OH in methanol-d3 at 77 K

Autor:	Vladimir L. Vyazovkin, Vladimir A. Tolkatchev
Rok vydání:	2000
Předmět:	Ethanol Chemistry Stereochemistry Radical Kinetics General Physics and Astronomy Methyl radical Fraction (chemistry) Isotopomers chemistry.chemical_compound Kinetic isotope effect Physical chemistry Methanol Physical and Theoretical Chemistry
Zdroj:	Physical Chemistry Chemical Physics. 2:3797-3800
ISSN:	1463-9084 1463-9076
DOI:	10.1039/b002210l
Popis:	The decay kinetics of methyl radical isotopomers has been studied at 77 K in glassy mixtures xR′HOH+(1−x)CD3OH, where R′HOH is either CH3OH or C2H5OH. In matrices with a small fraction of H component (x⩽0.02) the CD3 radicals decay twice as quickly as the CH3 radicals. As the H content in the mixture increases, the difference in the decay rates of the methyl radical isotopomers first gradually decreases to zero, and for x>0.2 CH3 decays faster than CD3 . A comparison is made with previous results for ethanol glass.
Databáze:	OpenAIRE
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