Pattern of addition of hydroxyl radicals to the spin traps. alpha.-pyridyl 1-oxide N-tert-butyl nitrone

P Neta, S Steenken, EG Janzen…

Index: Neta, P.; Steenken, S.; Janzen, Edward G.; Shetty, Raghav V. Journal of Physical Chemistry, 1980 , vol. 84, # 5 p. 532 - 534

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Citation Number: 51

Abstract

Hydroxyl radicals react with a-2-, a-3, and a-4-pyridyl l-oxide N-tert-butyl nitrones (POBN) with rate constants of 3.2 X lo9, 4.8 X lo9, and 3.5 X lo9 Ml, r espectively, via addition to two distinct sites. Addition to the pyridine ring yields short-lived radicals of the hydroxyazacyclohexadienyl type, while addition to the nitrone function in the side chain yields long-lived nitroxide radicals. The distribution of OH addition at the two molecular ...