Alkoxysilane elimination and its anomalous stereochemical behaviour for some ionized silane derivatives

K. Vékey, J. Tamás

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The electron impact and chemical ionization mass spectra of several cyclopropyl (cyclopropenyl) silanes containing an ester (ether) group on the cyclopropyl ring has been studied. Trialkylalkoxysilane or disiloxane elimination from the molecular ion was found to be a main common fragmentation route. Surprisingly; this was more significant for the trans than for the cis isomers. This inverse stereochemical effect is explained in terms of a competitive alkyl elimination from the silicon atom, which involves neighbouring group participation for the cis isomers.

Original languageEnglish
Pages (from-to)519-522
Number of pages4
JournalInternational Journal of Mass Spectrometry and Ion Physics
Issue numberC
Publication statusPublished - Feb 1983


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