Intermediacy of ion neutral complexes in the fragmentation of short-chain dialkyl sulfides
摘要:
The main fragmentation processes after electron ionization of butyl methyl and butyl ethyl sulfides are rationalized by the intermediacy of the ion neutral complex [RSH . methylcyclopropane](+.) as demonstrated by extensive labeling and collision activation studies. Copyright (C) 1999 John Wiley & Sons, Ltd.
<sup>13</sup>C-NMR.-Spektroskopie von Organolithiumverbindungen bei tiefen Temperaturen. Strukturinformation aus der<sup>13</sup>C,<sup>6</sup>Li-Kopplung
作者:Dieter Seebach、Robert Hässig、Josef Gabriel
DOI:10.1002/hlca.19830660128
日期:1983.2.2
Low-Temperature 13C-NMR. Spectroscopy of Organolithium Derivatives. - 13C, 6Li-Coupling, a Powerful Structural Information
低温13 C-NMR。有机锂衍生物的光谱学。- 13 ℃,6节锂耦合,强大的结构性信息
Unimolecular dissociations of the [2-hexanone]+˙ metastable ion
AbstractThe metastable molecular ion of 2‐hexanone loses a methyl radical mainly (∼80%) from positions C(4) and C(6), in equal proportions, as indicated by 13C labelling. The necessary skeletal rearrangement of the butyl chain is interpreted in terms of a 1,2‐[enol‐olefin] +˙ shift. The results and the mechanisms concerning the minor eliminations of C2H4, C2H5˙, C3H5˙ and C3H6 neutrals are also discussed.