Abstract

AbstractUnimolecular dissociations of metastable methylsilyl cations CH3SiH3+ are investigated by mass‐analysed ion kinetic energy (MIKE) spectrometry. The predominant fragmentation is H2 loss which proceeds via at least two distinct mechanisms with substantially different kinetic energy releases. Their reaction mechanisms are inferred from the results of experiments and MNDO calculations. The MIKE spectrum of the deuterium‐labelled ion, CH3SiD2+ indicates that the H and D atoms are randomized before dissociation.

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