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Kinetics and mechanism of the reactions of the superoxide ion in solutions. I. Absorption spectra and interaction with solvents and cations
Author(s) -
Afanas′ev I. B.,
Kuprianova N. S.,
Polozova N. I.
Publication year - 1983
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.550151008
Subject(s) - chemistry , ion , superoxide , absorption (acoustics) , absorption spectroscopy , acetonitrile , spectral line , analytical chemistry (journal) , dimethylformamide , proton , inorganic chemistry , solvent , organic chemistry , physics , quantum mechanics , astronomy , acoustics , enzyme
Absorption spectra of the superoxide ion have been studied in dimethylformamide (DMF) and acetonitrile (AN). It was found that the superoxide ion existed in equilibrium with an ion pair in AN ( K eq = 20 M −1 , Bu 4 N + is the cation) and as “free” (solvated) ion in DMF. The addition of DMF caused the destruction of an ion pair in AN. The addition of the proton donors HX (water or ethanol) to the \documentclass{article}\pagestyle{empty}\begin{document}${\rm O}_{\rm 2}^{\overline {\rm .} }$\end{document} solutions in DMF and AN caused the formation of new ion pairs (Bu 4 N + \documentclass{article}\pagestyle{empty}\begin{document}${\rm O}_{\rm 2}^{\overline {\rm .} }$\end{document} ) 2 HX. The equilibrium constants of these ion pairs were determined in DMF and AN.