Structures of product ions C6H7+ and C6H9+ of ion–molecule reactions with allyl bromide

✍ Scribed by Zhiqing Zhu; Tino Gäumann

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 778 KB
• Volume: 28
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210281022

✦ Synopsis

Abstract

The ion–molecule reactions of allyl bromide with the molecular ion of allyl bromide and with its major fragment, the allyl ion, yield the C~6~H~7~^+^ and C~6~H~9~^+^ ions. The structure of these product ions was explored by means of photofragmentation with laser light in the 10 μm region and by proton transfer reaction to selected reagents. These product ions were also formed by other reactions and their reactivities compared. In both cases the presence of at least two populations is demonstrated. For C~6~H~9~^+^ these two populations are initially present, whereas for C~6~H~7~^+^ an isomer is formed by the infrared light before the loss of H~2~. When this ion is produced by photofragmentation of C~6~H~7~^+^, at least one third, stable isomer is formed. Two isomers of C~6~H~5~^+^ are formed in the photofragmentation of C~6~H~7~^+^, but only one form photofragments further by loss of C~2~H~2~. The use of non‐linear least‐squares fitting does not allow definite conclusions to be drawn concerning the kinetics of the consecutive photofragmentations.