Excitation of the nitro group in nitromethane by electron transfer

R. F. M. Lobo, A. M. C. Moutinho, K. Lacmann, J. Los

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25 Citations (Scopus)


In this paper we report on complementary measurements on ion-pair formation in collisions between K atoms and CH3NO2 molecules. The experiments were performed in a c.m. energy range from 20 up to 300 eV. Double differential cross sections were obtained by measuring the K+ ion yield as a function of the scatter angle and as a function of the post-collision laboratory energy. On the other hand, relative total partial cross sections for the formation of CH3NO- 2, NO- 2, and O- were measured in the same energy range. The experimental results lead to the conclusion that in this energy range electron transfer takes place to three ionic states of CH3NO- 2, a dominantly repulsive 2A1 state and two 2B1 states with relatively deep potential wells.

Original languageEnglish
Pages (from-to)166-175
Number of pages10
JournalJournal of Chemical Physics
Issue number1
Publication statusPublished - 1 Jul 1991


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