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- W1966290132 abstract "Abstract The topology of the potential energy surface associated with 1-pentene–Cu + and 1-octene–Cu + was investigated through the use of high-level density functional theory calculations. This theoretical survey, together with a combination of tandem mass spectrometry and isotopic labeling experiments carried out for 1-octene, confirm that the pseudo-insertion mechanism tentatively proposed by Fordham et al. [J. Mass Spectrom. 34 (1999) 1007], is the most favorable one. In this mechanism, attachment of the metal cation to the π-system forces a folding of the alkyl chain which favors the formation of an hexa-coordinated intermediate much more stable than the complexes formed along a typical dissociative attachment process. We have also shown that the main features of the pseudo-insertion mechanism do not change when the alkyl chain attached to the CC double bond is much longer. Hence, we can safely conclude from our calculations and the experimental results obtained for 1-octene deuterated derivatives, that this mechanism would explain, in general, the specific reactivity of Cu + with alkenes. We have also shown that the minor loss of H 2 systematically observed in these gas-phase processes, would be related with the ability of Cu + to yield strong agostic interactions either with the methylene groups or with the terminal methyl group of the alkyl chain." @default.
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- W1966290132 date "2003-08-01" @default.
- W1966290132 modified "2023-10-14" @default.
- W1966290132 title "Specific reactivity of 1-alkenes with transition metal cations" @default.
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- W1966290132 doi "https://doi.org/10.1016/s1387-3806(03)00130-1" @default.
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