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Ion pair catalysis of the autooxidation of pyridine and benzil in emulsion systems
Author(s) -
Franklin Thomas C.,
Ogiya Naoyuki
Publication year - 1980
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.550121214
Subject(s) - benzil , chemistry , autoxidation , pyridine , oxidizing agent , hydroxide , catalysis , sodium hydroxide , organic chemistry , emulsion , oxygen , polymer chemistry , photochemistry , inorganic chemistry
It was found that the rates of absorption of oxygen by pyridine–aqueous sodium hydroxide emulsions and the same emulsions containing benzil were catalyzed by the addition of quaternary salts and followed the same rate law:\documentclass{article}\pagestyle{empty}\begin{document}$$ - \frac{{dPo_2}}{{dt}} = k_1 \left[{{\rm Po}_{\rm 2}} \right]\left[{^ -} \right]\left[{{\rm benzil}} \right]^0 + k_2 \left[{{\rm Po}_2} \right]\left[{OH^ -} \right]\left[{{\rm Et}_{\rm 4} {\rm NCl}} \right][benzil]^0 $$\end{document} . It was concluded that the autooxidation of benzil in pyridine‐aqeuous sodium hydroxide emulsions has as its rate‐determining step a step in the autooxidation of pyridine. Possibly the superoxide formed in the autooxidation of pyridine is the oxidizing agent in the oxidation of benzil.