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Kinetics of the reactions of singlet molecular oxygen (O 2 1 Δ g ) with organic compounds in the gas phase
Author(s) -
Huie Robert E.,
Herron John T.
Publication year - 1973
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.550050204
Subject(s) - chemistry , singlet oxygen , reaction rate constant , singlet state , oxygen , titration , photoionization , gas phase , phase (matter) , kinetics , photochemistry , analytical chemistry (journal) , organic chemistry , ion , excited state , atomic physics , physics , quantum mechanics , ionization
The reactions of singlet molecular oxygen (O 2 1 Δ g ) with a series of organic compounds have been studied in the gas phase at 298°K. The concentration of singlet molecular oxygen was determined by titration with 2,5‐dimethylfuran. The titration technique was checked using a photoionization technique. Absolute rate constants were measured on the basis of the loss of organic reactant and, in some cases, of singlet molecular oxygen. It was found that the usual method of producing singlet molecular oxygen in the gas phase can also, under some conditions, allow reactive species other than singlet molecular oxygen to enter the reactor, leading to serious errors in the determination of rate constants. This problem was eliminated by carrying out the rate measurements in the presence of a small amount of nitrogen dioxide a radical scavenger.