GENERATION OF 15N LABELLED BIS(POLYFLUOROALKYL)NITROXIDES AND THEIR HYDROGEN-ABSTRACTION REACTIONS WITH ALKANES, ALKYLBENZENES AND ALDEHYDES

Article abstract of DOI:10.1016/S0022-1139(00)81074-X

Blue solutions containing 15N labelled bis(polyfluoroalkyl) nitroxides and spin traps, polyfluoronitrosoalkanes, were conveniently made from the reactions of Na15NO2 with polyfluoro-compounds, (R_FCO2), R_FI and R_FSO2Br in F113.It has been found that the nitroxides effected fast H-abstraction from alkanes, alkylbenzenes, aldehydes and the radicals derived from the substrates were in turn effectively trapped by R_F15NO to give 15N labelled spin adducts detectable by ESR.The bigger a_N(15_N) values as well as much simpler splittings of both the nitroxides and the spin adducts have made the kinetic studies of the H-abstraction and other radical reactions quite feasible.