Neutral counterparts of the C2H7O+ isomers

✍ Scribed by M. Sirois; M. George; J. L. Holmes

• Book ID: 102965954
• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 544 KB
• Volume: 29
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210290103

✦ Synopsis

Abstract

The neutral counterparts of the C~2~H~7~O^+^ isomers CH~3~O^+^ (H)CH~3~, CH~3~CH~2~OH~2~^+^ and \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm C}_2 ,{\rm H}_4 ,, \cdot \cdot \cdot \mathop {\rm H}\limits^ + , \cdot \cdot \cdot {\rm OH}_2 $\end{document} were studied by neutralization‐reionization mass spectrometry. Protonated dimethyl ether and its —O(D)^+^ analogue were produced by protonation (deuteration) of dimethyl ether and also generated as a fragment ion from (labeled) ionized CH~3~OCH~2~CH(OH)CH~3~ by loss of CH~3~CO⋅. It was observed that the dissociation characteristics of the ions and the stability of their neutral counterpart depended on the internal energy of the protonated ether ions. Stable neutral CH~3~Ȯ(H)CH~3~ was only produced from energy‐rich ions. The classical protonated ethanol ion CH~3~CH~2~OH~2~^+^ (a) was produced at threshold by the loss of CH~3~CO⋅. from ionized butane‐2,3‐diol. Mixtures of a with the non‐classical ion \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm C}_2 ,{\rm H}_4 ,, \cdot \cdot \cdot \mathop {\rm H}\limits^ + , \cdot \cdot \cdot {\rm OH}_2 $\end{document} (b) were produced by reaction of C~2~H~5~^+^ ions with H~2~O. As for the protonated ether, only high‐energy a and/or b ions yielded stable hypervalent radicals. It is suggested that the stable C~2~H~7~⋅O radicals are Rydberg states.