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Decomposition of di-tert-butyl nitroxide in aqueous solutions
Authors:T Cceres  C Urzúa  E A Lissi
Institution:T. Cáceres,C. Urzúa,E. A. Lissi
Abstract:Di-tert-butyl nitroxide (DTBN) decomposes in aqueous solutions producing 2-methyl-2-nitroso propane (MNP) and tert-butanol. The process is acid catalyzed, it is of second order in DTBN, and takes place with a rate constant of (1.0 ± 0.1) M?2 s?1. The reaction is also catalyzed by the anionic surfactant sodium dodecyl sulfate and by Fe(II) and Fe(III) ions. The catalysis by Fe(III) involves a very fast reduction of Fe(III) ions with concomitant formation of 2-methyl-2-nitroso propane. The reaction catalyzed by Fe(II) also produces 2-methyl-2-nitroso propane with a formation rate given by: dMNP]/dt = (0.25 ± 0.10) Fe(II)] DTBN]. This reaction rate is nearly pH independent.
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