Abstract
Hydrogen abstraction from
(CH3),S and CH3COCH3 by CH3
radicals
CH3+CH3SCH3 → CH4+CH3SCH2
CH3 + CH3COCH3 → CH4 +
CH3COCH2
has been studied in the
temperature range 120-245�. The rate constants, based on the value of 1013.34cm3
mol-l s-1 for the recombination of CH3
radicals, are given by (k in cm3 mol-1 s-1, E
in kJ mol-1, R = 0.008314 kJ K-1 mol-1):
logk1 = (11.62 �
0.08) ? (38.35 � 0.68)/2.303RT
logk3 = (11.61 �
0.05) ? (40.48 � 0.46)/2.303RT
Combination of the results
for (1) with thermochemical data gives a calculated value of
Logk-1 = (11.8
-63.7/2.303RT
for the rate constant of
the reverse reaction. The results for CH3+(CH3)2S
are compared with all of the available data for hydrogen abstraction by free
radicals from both sulphur-containing compounds, and
molecules of the type (CH3)xM.
Cited by
17 articles.
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