S. Tajima, H. Iida, S. Tobita
Sep 1, 1990
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Influential Citations
10
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Journal
Journal of Mass Spectrometry
Abstract
The unimolecular decomposition of trimethoxyphenylsilane (1) was investigated by mass-analysed ion kinetic energy (MIKE) spectrometry, deuterium-labelling studies and from high resolution data. The characteristic fragmentations of metastate molecular ion of 1 were losses of C 6 H 6 and C 7 H 7 . with rearrangements. Almost complete H/D scrambling occured in the molecular ion prior to these decompositions. The other important fragmentation routes corresponded to expulsions of CH 3 O . and C 6 H 5 . . These fragmentations were followed by consecutive elimination of an H 2 CO molecule, as commonly observed in the mass spectra of alkoxysilanes. In these fragmantation processes, H/D scrambling increased as the internal energy of the molecular ion was lowered. The fragmentations of & were compared with those of its carbon analogue, α,α,α-trimethoxyluene