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- W2066408025 abstract "Using specific deuterium labelling the mechanisms of the olefin elimination reactions leading to formation of [C6H7]+ in the H2 and CH4 chemical ionizatin mass spectra of ethylbenzene and n-propylbenzene (and to [C2H5C6H6]+ in the CH4 chemical ionization mass spectra) have been investigated. The results show that the reaction does not occur by specific migration of H from the β position of the alkyl group to the benzene ring. For ethylbenzene 23–29% of the migrating H originates from the α-position, while for n-propylbenzene H migration from all propyl positions is observed in the approximate ratio, position 1:position 2:position 3=0.30:0.22:0.48. It is proposed that the results can be explained on the basis of competing H migration from each alkyl position involving cyclic transition states of different ring sizes, rather than by H randomization within the alkyl chain." @default.
- W2066408025 created "2016-06-24" @default.
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- W2066408025 date "1977-09-01" @default.
- W2066408025 modified "2023-10-11" @default.
- W2066408025 title "Hydrogen migrations in mass spectrometry. IV—formation of [C6H7]+ in the chemical ionization mass spectra of alkylbenzenes" @default.
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- W2066408025 doi "https://doi.org/10.1002/oms.1210120912" @default.
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