Premium
Pulse radiolysis study of the reaction of OH radicals with C 2 H 4 over the temperature range 343–1173 K
Author(s) -
Liu AnDong,
Mulac William A.,
Jonah Charles D.
Publication year - 1987
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.550190104
Subject(s) - radical , chemistry , ethylene , radiolysis , hydrogen atom abstraction , atmospheric temperature range , torr , photochemistry , hydrogen atom , hydrogen , analytical chemistry (journal) , organic chemistry , alkyl , catalysis , thermodynamics , physics
The reaction of OH and OD radicals with ethylene in the presence of 1 atm argon and 6 Torr water vapor was studied in the temperature range 343–1173 K. The results reveal three kinetically separate temperature regions: (1) 343–563 K, where the disappearance of OH radical is dominated by the addition of OH to the double bond of ethylene; (2) 563–748 K, where concurrent reactions of addition, the reverse reaction of addition and H‐atom abstraction is dominant; and (3) 748–1173 K, where H‐atom abstraction is likely the main reaction. The rate for hydrogen abstraction is 2.4 × 10 −11 exp[(−2104 ± 125)/ T ] cm 3 /molec‐s (for OD 2.1 × 10 −11 exp[(−2130 ± 172)/ T ] cm 3 /molec‐s). There was no obvious pyrolysis of ethylene below 1073 K. The study of OD radical with ethylene shows a small isotope effect.