Principal Processes in the Radiolysis of Gases with Fission Recoils and gamma Rays. Annual Progress Report, October 16, 1979-September 15, 1980

摘要

High resolution mass spectrometry and threshold photoelectron-coincident photoion mass spectrometry of propane-2- exp 13 C showed that skeletal isomerization in propane ions precedes the fragmentation of that ion to ethylene ion and methane. Methylnitrite ion was exceptional in its fragmentaion near threshold; the products NO exp + and CH sub 3 O exp + are not competitive. Electron range and energy loss for 50 to 500 eV electrons were measured for the rare gases and nitrogen. Isomerization of nitromethane ion to methylnitrite ion appears to be controlled by electronic state correlation. While highly exothermic even at threshold for parent ion formation of nitromethane, dissociation and presumably isomerization to methylnitrite ion occur only from the upper, 2A'' state of nitromethane ion, which correlates approximately with the 2A'' state of methylnitrite ion. (ERA citation 06:009488)