Accurate analysis of the mixture of hydroxylamines 8 formed when suitable peroxides 4 undergo homolysis in the presence of the nitroxyl radical 1, 1, 3, 3-tetramethylisoindolin-2- yloxy (T) has afforded rate constants for ring opening of the cyclopropylmethyl radicals 2a, 2c, 2dc*, 2dtmw, and 2e and cyclization of the, but-3-enyl radicals la, IC, and Id. The presence of methyl substituents enhances the rates both of cyclization and of ring opening ...
