84615-47-4Relevant articles and documents
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Kirmse,W.,Zellmer,V.,Goer,B.
, p. 4912 (1986)
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Synthesis of [1-11C]propyl and [1-11C]butyl iodide from [11C]carbon monoxide and their use in alkylation reactions
Eriksson, Jonas,Antoni, Gunnar,Langstroem, Bengt
, p. 1105 - 1116 (2007/10/03)
A method to prepare [1-11C]propyl iodide and [1- 11C]butyl iodide from [11C]carbon monoxide via a three step reaction sequence is presented. Palladium mediated formylation of ethene with [11C]carbon monoxide and
Ion-Neutral Complexes as Intermediates in the Decompositions of C5H10O2.+ Isomers
McAdoo, David J.,Hudson, Charles E.,Skyiepal, Mark,Broido, Ellen,Griffin, Lawrence L.
, p. 7648 - 7653 (2007/10/02)
Ionized pentanoic acid, 3-methylbutanoic acid, and the enol isomer of ionized isopropyl acetate are shown to pass in part through common intermediates before decomposing to CH3C.HC(OH)2+ (7) and the "McLafferty + 1" ion CH3C(OH)2+ (10).The H transfer to form the methyl of CH3C(OH)2+ and the joining of two CH2 groups to form the C-C bond in the ethylene eliminated to produce CH3C.HC(OH)2+ are both attributed to reactions of the ion-neutral complex .H2C(OH)2+>.The McLafferty + 1 ion is also formed, especially from ionized esters, by another pathway in which complexes may or may not be intermediates.The intermediacy of the ion-neutral complexes is supported by energetic considerations, isotope effects, and the decomposition patterns of labeled ions.The latter correlate with a preference for hydrogen transfer from the end carbons of the C3 partner in other reactions proposed to be complex-mediated.Unification of the McLafferty rearrangement, the McLafferty + 1 rearrangement, and the McLafferty rearrangement with charge reversal by a common initial γ-hydrogen rearrangement followed by dissociation or isomerization in ion-neutral complexes is proposed.Group migration by 1,2-shifts, possibly by dissociation to form a double bond in one partner in an ion-neutral complex followed by addition at the opposite end of the double bond, is shown to be a general reaction of ions in the gas phase.