Determination of bond energies of organic silicon compounds on the basis of appearance potentials

József Borossay, Béla Csárvári, László Szepes

Research output: Contribution to journalArticle

Abstract

For the kinetic treatment of the rearrangement reactions of siloxanes it was necessary to study the relative bond dissociation energies of the various silicon-oxygen bonds present in the siloxane chain. Therefore, appearance potentials of the trimethyl-silyl-and trimethyl-siloxy-ions formed in the course of fragmentation were determined by means of the electron impact method, and bond dissociation energies of the corresponding bonds were evaluated. A 20% increase in the bond dissociation energy was found for the silicon-oxygen bond adjacent to the vinyl-group in vinyl-substituted siloxanes. On the basis of this finding a differential equation was established which correctly describes the rearrangement reaction of heptamethyl-3-vinyl-trisiloxane.

Original languageEnglish
Pages (from-to)47-54
Number of pages8
JournalInternational Journal of Mass Spectrometry and Ion Physics
Volume7
Issue number1
DOIs
Publication statusPublished - Jul 1971

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