Illenberger Eugen, Meinke Martina C
Institut für Chemie-Physikalische und Theoretische Chemie, Freie Universität Berlin , Takustrasse 3, D-14195 Berlin, Germany.
J Phys Chem A. 2014 Aug 21;118(33):6542-6. doi: 10.1021/jp503129z. Epub 2014 May 29.
The impact of low energy electrons (0-10 eV) to 1,1,1-trifluoroacetone yields a variety of fragment anions which are formed via dissociative electron attachment (DEA) through three pronounced resonances located at 0.8 eV, near 4 eV, and in the energy range 8-9 eV. The fragment ions arise from different reactions ranging from the direct cleavage of one single or double bond (formation of F(-), CF3(-), O(-), (M-H)(-), and M-F)(-)) to remarkably complex unimolecular reactions associated with substantial geometric and electronic rearrangement in the transitory intermediate (formation of OH(-), FHF(-), (M-HF)(-), CCH(-), and HCCO(-). The ion CCH(-), for example, is formed by an excision of unit from the target molecule through the concerted cleavage of four bonds and recombination to H2O within the neutral component of the reaction.
低能电子（0 - 10电子伏特）与1,1,1 - 三氟丙酮相互作用会产生多种碎片阴离子，这些阴离子是通过解离电子附着（DEA）形成的，经由位于0.8电子伏特、接近4电子伏特以及8 - 9电子伏特能量范围内的三个明显共振峰。碎片离子源自不同反应，从单个或双键的直接断裂（形成F(-)、CF3(-)、O(-)、(M - H)(-)和M - F)(-)）到与过渡中间体中大量几何和电子重排相关的极其复杂的单分子反应（形成OH(-)、FHF(-)、(M - HF)(-)、CCH(-)和HCCO(-)）。例如，离子CCH(-)是通过从目标分子中切除一个单元形成的，该过程通过四个键的协同断裂以及在反应的中性组分内与H2O重组来实现。
