The Mass Spectrometric Fragmentation of 1-Heptyl Ions Derived from the Corresponding Halides

✍ Scribed by André Fiaux; Bernhard Wirz; Tino Gäumann

• Publisher: John Wiley and Sons
• Year: 1974
• Tongue: German
• Weight: 508 KB
• Volume: 57
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19740570305

✦ Synopsis

Abstract

We have studied the fragmentation of 1‐heptyl ions resulting from the loss of halogen from the corresponding halide ions. All positions had been labelled with D and ^13^C, some positions even doubly labelled. The main processes are the loss of propene and, to a lesser extent, ethylene as neutral fragments. All carbon atoms have a definite probability of being lost with the olefin, those which are terminal having the smallest chance; this precludes an important contribution by direct scission. The source‐and the metastable‐decomposition produced much the same isotopic distribution in the fragments. The terminal hydrogen atoms also have a small chance of being rearranged, whereas those at non‐terminal positions show extensive scrambling. It seems that the fragmentation proceeds via cyclic structures which are rapidly attained and equilibrated amongst each other, but our results do not warrant suggestion of a detailed model.