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The production and subsequent relaxation of vibrationally excited OH in the reaction of atomic oxygen with HBr
Author(s) -
Spencer John E.,
Glass G. P.
Publication year - 1977
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.550090109
Subject(s) - chemistry , excited state , radical , atomic oxygen , oxygen , relaxation (psychology) , reaction rate constant , electron paramagnetic resonance , analytical chemistry (journal) , photochemistry , kinetics , atomic physics , nuclear magnetic resonance , organic chemistry , psychology , social psychology , physics , quantum mechanics
A fast discharge flow apparatus equipped for EPR detection of radicals has been used to investigate the reaction O + HBr → OH + Br. At 295°K, measurements showed that more than 97% of all OH produced in this reaction was formed initially in its first vibrationally excited state. Rate constants for physical deactivation of OH( v = 1) by O( 3 P ), Br( 2 P 3/2 ), H 2 O, and HBr were measured as (1.45 ± 0.25) × 10 −10 , (6.4 ± 2.4) × 10 −11 , (1.35 ± 0.50) × 10 −11 , and < 10 −12 cm 3 /molec·sec, respectively.