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SiNCO+and SiNCS+and their neutral counterparts

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
316
Identifiers
DOI: 10.1016/s0009-2614(99)01253-1
Keywords
  • Silicon Isocyanate
  • Silicon Isothiocyanate
  • Mass Spectrometry

Abstract

Abstract [Si,C,N,O] + and [Si,C,N,S] + cations formed upon electron ionization of trimethylsilyl isocyanate and isothiocyanate, respectively, are probed by tandem mass spectrometry. In the case of [Si,C,N,O] +, the experimental data suggest that the isocyanato group remains intact upon ionization such that silicon isocyanate SiNCO + is formed. Neutralization-reionization mass spectrometry indicates that also neutral SiNCO is a viable molecule in the gas phase. Instead, partial isomerization to SiSCN + is indicated for the sulfur analog. Because of this structural dichotomy, the nature of the [Si,C,N,S] + species giving rise to the recovery signal in the neutralization-reionization experiments remains uncertain.

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