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Electron impact studies. CV—negative ion mass spectra of functional groups. The trimethylsilyl group. Singly charghed and doubly charged ions

✍ Scribed by John H. Bowie; Barbara A. Hale

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
445 KB
Volume
11
Category
Article
ISSN
1076-5174

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✦ Synopsis

Abstract

The 70 eV negative ion spectra of m‐ and p‐nitrophenyltrimethylsilyl‐ethers and ‐esters show pronounced molecular anions and simple fragmentation patterns. The spectra of the corresponding ortho isomers show peaks produced by rearrangement processes; these reactions have been studied by ^2^H and ^18^O labelling. p‐Nitrobenzoyl derivatives of amino trimethylsilyl esters are of limited use for characterization of amino acids. Certain of the compounds studied produce a variety of dianions.

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Electron impact studies. CI—negative ion
Electron impact studies. CI—negative ion mass spectra of the carbonyl group. The ArylCH2CO- and Aryl(CH2)2CO- systems
✍ John H. Bowie; Sompong Janposri 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 432 KB

## Abstract Fragmentations of the molecular anions of __m__‐ and __p__‐nitrophenyl‐CH~2~COR yield nitrobenzyl anions in the ion source when R = Ph, but the corresponding ion from the system where R = Me is only formed after collision activation. __o__‐ and __p__‐Nitrophenyl parent anions undergo