A McLafferty rearrangement in an even-electron system: C3H6 elimination from the α-cleavage product of tri-n-butylamine
摘要:
AbstractIt is shown by deuterium labelling, linked‐scan measurements and collision activation that the [M‐C3H7˙]+ (α‐cleavage) ion in the electron impact ionization spectrum of tributylamine loses C3H6 with transfer of one hydrogen specifically from the γ‐position. The experimental data point towards a mechanism which involves the intermediate formation of a distonic diradical ion from an excited α‐cleavage ion which then eliminates the neutral alkene.
Ion-neutral complexes as intermediates in the decompositions of C5H10O2.cntdot.+ isomers
作者:David J. McAdoo、Charles E. Hudson、Mark Skyiepal、Ellen Broido、Lawrence L. Griffin
DOI:10.1021/ja00259a012
日期:1987.12
Les acides valerique methyl-3 butyrique ionises et l'isomere enolique de l'acetate d'isopropyle ionise passent en partie via des intermediaires communs avant leur decomposition en CH 3 ĊHC(OH) 2 + et CH 3 C(OH) 2 +
Les acides valeriquemethyl-3 butyrique ionises et l'isomere enolique de l'acetate d'isopropyle ionise passent en partie via des intermediaires commons avant leurresolution en CH 3 ĊHC(OH) 2 + et CH 3 C(OH) 2 +
Boden, Neville; Bushby, Richard J.; Clark, Leslie D., Journal of the Chemical Society. Perkin transactions I, 1983, p. 543 - 551
作者:Boden, Neville、Bushby, Richard J.、Clark, Leslie D.
DOI:——
日期:——
Site-selective deuterium labeling of the tetrabutylammonium cation
Four separate selectively deuterated samples of tetrabutylammonium iodide have been prepared in which each one of the four nonequivalent alkyl carbons is separately and fully deuterated. These samples were prepared for nuclear magnetic resonance (NMR) studies of the aggregation of ion pairs in low polarity solvents.
Intermediacy of ion neutral complexes in the fragmentation of short-chain dialkyl sulfides
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.
Electrolysis of potassium butyrate in acetonitrile. A deuterium NMR study