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- W2083368164 abstract "Les spectres de masse des aldéhydes δε-insaturés gem-diméthylés en 4 présentent un ion m/e 126 résultant de l'élimination d'une oléfine à partir de l'ion moléculaire. Cette élimination implique la cyclisation intermédiaire des aldéhydes insaturés en cyclohexanone, comportement analogue à celui observé en photochimie. Les abondances relatives des décompositions unimoléculaires d'ion m/e 126 (observées par balagyage combiné) confirment le mécanisme proposé. The mass spectra of 4, 4-dimethyl δε-unsaturated aldehydes show an ion at m/e 126 which results from the elimination of a neutral olefin directly from the molecular ion. This fragmentation is shown to occur through a cyclohexanone intermediate involving a process whcih has its equivalent in the photochemistry of these aldehydes. The abundance ratios of the unimolecular metastable decompositions of these m/e 126 ions are in excellent agreement with the proposed mechanism." @default.
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- W2083368164 date "1977-11-01" @default.
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- W2083368164 title "Analogie Photochimique. II—Cyclisation des Aldéhydes δ,ɛ Insaturés sous Impact Electronique" @default.
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- W2083368164 doi "https://doi.org/10.1002/oms.1210121106" @default.
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