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The mechanism of O( 3 P) atom reaction with ethylene and other simple olefins
Author(s) -
Knyazev V. D.,
Arutyunov V. S.,
Vedeneev V. I.
Publication year - 1992
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550240605
Subject(s) - chemistry , torr , propene , ethylene , reaction rate constant , redistribution (election) , reaction mechanism , atom (system on chip) , photochemistry , analytical chemistry (journal) , kinetics , catalysis , organic chemistry , thermodynamics , physics , quantum mechanics , politics , political science , computer science , law , embedded system
Reactions of oxygen atoms with ethylene, propene, and 2‐butene were studied at room temperature under discharge flow conditions by resonance fluorescence spectroscopy of O and H atoms at pressures of 0.08 to 12 torr. The measured total rate constants of these reactions are K C 2 H 4= (7.8 ± 0.6)·10 −13 cm 3 s −1 , K C 3 H 6= (4.3 ± 0.4) ± 10 −12 cm 3 s −1 , K C 4 H 8= (1.4 ± 0.4) · 10 −11 cm 3 s −1 . The branching ratios of H atom elimination channels were measured for reactions of O atoms with ethylene and propene. No H‐atom elimination was found for the reaction of O‐atoms with 2‐butene. A redistribution of reaction O + C 2 H 4channels with pressure was found. A mechanism of the O + C 2 H 4reaction was proposed and the possibility of its application to other olefins is discussed. On the basis of mechanism the pressure dependence of the total rate constant for reaction O + C 2 H 4was predicted and experimentally confirmed in the pressure range 0.08–1.46 torr.