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Loss of H 2 from metastable CH 3 SiH   2 + ions
Author(s) -
Tobita Seiji,
Nakajima Katsuyoshi,
Tajima Susumu,
Shigihara Atsushi
Publication year - 1990
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290041104
Subject(s) - chemistry , metastability , fragmentation (computing) , ion , kinetic energy , deuterium , dissociation (chemistry) , mndo , mass spectrometry , mass spectrum , bond dissociation energy , collision induced dissociation , analytical chemistry (journal) , atomic physics , tandem mass spectrometry , molecule , organic chemistry , physics , quantum mechanics , chromatography , computer science , operating system
Unimolecular dissociations of metastable methylsilyl cations CH 3 SiH 3 + are investigated by mass‐analysed ion kinetic energy (MIKE) spectrometry. The predominant fragmentation is H 2 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, CH 3 SiD 2 + indicates that the H and D atoms are randomized before dissociation.

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