Collision-induced dissociation of the phenylsilane molecular ion

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Abstract

The high-energy collision-induced dissociation of the phenylsilane molecular ion generated by electron ionization has been investigated using tandem mass spectrometry (MS/MS). It was observed that the dissociation of the molecular ion (M+) occurs mainly via [M-H]+ [M-2H]+, and [M-3H]+, followed by two consecutive losses of C2H2. The structures of the precursors for the [M-CH3]+, [M-SiH]+, and [M-SiH2]+. ions are proposed. The data suggest that the molecular ion undergoes rearrangements to several isomers prior to dissociation, including the ion containing a five-membered carbon ring. Reaction mechanisms are proposed for the dissociations via the isomeric molecular ions.

Original languageEnglish
Pages (from-to)207-211
Number of pages5
JournalRapid Communications in Mass Spectrometry
Volume17
Issue number3
DOIs
StatePublished - 2003

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