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Tetramethylsilane Chemical Ionization Mass Spectrometry of Mono-substituted Aromatic Compounds: Gas-phase Trimethylsilylation

✍ Scribed by R. Srinivas; A. Rama Devi; G. K. Viswanadha Rao

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
397 KB
Volume
10
Category
Article
ISSN
0951-4198

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✦ Synopsis

The tetramethylsilane (TMS) chemical ionization (CI) spectra of the mono-substituted aromatics studied contain M+' and adduct [M + (CH, 1, IS]' ions. Abundant M+' ions are observed in compounds with electrondonating groups and are attributed to charge-exchange reactions of reactant ions in the TMS CI plasma. The stabfity of adduct ions in the halobenzenes was found to increase from fluorobenzene to iodobenzene. A collision-induced dissociation study of the [M + (CH,),Si]' ions of these compounds has been carried out to gain an insight into the site of adduction.

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