19F-NMR spin trapping: detection of free radical reactions with new fluorinated spin traps: Valery V. Khramtsov, T.Clanton, L. Berliner, V.A. Reznikov, S.V.Sergeeva, A.K.Litkin, Ohio State Univ., Columbus OH, Inst. of Chem. Kinetics & Combustion, Inst. of Organic Chem., Novosibirsk, Russia