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• W2037316705 startingPage "133" @default.
• W2037316705 abstract "The unimolecular metastable ion dissociations of o -trimethylsilyl toluate, o -CH 3 C 6 H 4 COOSi(CH 3 ) 3 (1) and its fluorine analogue, o -trimethylsilyl α , α , α -trifluorotoluate, o -CF 3 C 6 H 4 COOSi(CH 3 ) 3 ( 2 ), upon electron impact, have been investigated by means of B/E linked scan and high resolution data. The fragmentation processes of these compounds were elucidated with the aid of those of the corresponding acids, o -toluic acid, o -CH 3 C 6 H 4 COOH ( 3 ) and o - α , α , α -trifluorotoluic acid, o -CF 3 C 6 H 4 COOH ( 4 ), respectively. No molecular ion is observed for 2 , but a fairly abundant molecular ion is observed for 1 . The fragmentation of 1 +· is different from that of 2 +· , except for the loss of −CH 3 from the respective molecular ions. In the case of 1 , (CH 3 ) 3 SiOH is eliminated from 1 +· with the migration of the hydrogen from the methyl group attached to the benzene ring to the ether oxygen, giving rise to the peak at m / z 118. The corresponding loss was not observed in the fragmentation of 2 +· . This was attributable to a greater electronegativity of the fluorine atom than that of a hydrogen atom. In the fragmentations of the compounds studied here, the so-called ortho-effect is operative. During the fragmentation of 2 +· and 4 +· , interesting F atom rearrangements were observed." @default.
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• W2037316705 date "1997-02-01" @default.
• W2037316705 modified "2023-10-18" @default.
• W2037316705 title "Metastable ion study of organosilicon compounds. Part X. o-CH3C6H4COOSi(CH3)3 and o-CF3C6H4COOSi(CH3)3" @default.
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• W2037316705 doi "https://doi.org/10.1016/s0168-1176(96)04471-0" @default.
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