Structure and formation of gaseous [C4H5O]+ Ions. II–Ions of the type HCC\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm C}\limits^{\rm + } $\end{document}(OH)(CH3)

AbstractLoss of an alkyl group X⋅ from acetylenic alcohols HCCCX(OH)(CH3) and gas phase protonation of HCCCOCH3 are both shown to yield stable HCC\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm C}\limits^{\rm + } $\end{document}(OH)(CH3) ions. Ions of this structure are unique among all other [C4H5O]+ isomers by having m/z 43 [C2H3O]+ as base peak in both the metastable ion and collisional activation spectra. It is concluded that the composite metastable peak for formation of m/z 43 corresponds to two distinct reaction profiles which lead to the same product ion, CH3\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm C}\limits^{\rm + } $\end{document}O, and neutral, HCCH. It is further shown that the [C4H5O]+ ions from related alcohols (like HCCCH(OH)(CH3)) which have an α‐H atom available for isomerization into energy rich allenyl type molecular ions, consist of a second stable structure, H2C\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm C}\limits^{\rm + } $\end{document}C(OH)CH2.

Structure and formation of gaseous [C₄H₅O]⁺ Ions. II–Ions of the type HCC\documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm C}\limits^{\rm + } $\end{document}(OH)(CH₃) Journal Articles