Influence de l'energie interne sur la reactivite de l'ion Fe(CO)_2~+ avec le dimethylether, etudiee dans un spectrometre de masse FT-ICR

摘要

The influence of the internal energy on the reactivity of iron carbonyl cations with dimethylether CH_3OCH_3 (DME0 has been studied using a triple cell Fourier Transform Ion Cyclotron Resonance mass spectrometer. The experimental set-up as well as the data analysis are briefly presented before being detailed on the example of the reactivity of Fe(CO)_2~+. The strong energy dependence upon the reactivity of the ion is shown: when working with thermalised ions, the only channels observed are the two successive substitutions of a CO ligand by one DME molecule, whereas other channels are opened up for excited ions (the cleavage of the C-O bond may be homolytic or due to a rearrangement). A reaction mechanism of the C-O bond activation is then proposed.