𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Electron impact studies. CI—negative ion mass spectra of the carbonyl group. The ArylCH2CO- and Aryl(CH2)2CO- systems

✍ Scribed by John H. Bowie; Sompong Janposri

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
432 KB
Volume
10
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

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 β‐cleavage to the carbonyl centre to produce nitrobenzyl anions. Pronounced rearrangement peaks are noted in the spectra of o‐nitrophenyl‐ compounds. Labelling studies indicate the identity of the eliminated species, but the mechanisms of the rearrangements are complex.

📜 SIMILAR VOLUMES

Electron impact studies. CV—negative ion
Electron impact studies. CV—negative ion mass spectra of functional groups. The trimethylsilyl group. Singly charghed and doubly charged ions
✍ John H. Bowie; Barbara A. Hale 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 445 KB

## 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