𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Electron impact fragmentation of 2-arylhydrazonopropandioic acid derivatives

✍ Scribed by R. Krishna Mohan Rao Kallury; Alexander G. Loudon

Publisher
John Wiley and Sons
Year
1979
Tongue
English
Weight
373 KB
Volume
14
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Examination of the mass spectra of eleven 2‐arylhydrazonopropandioic acid derivatives reveals that a radical ion which is tentatively formulated as a 1__H__‐diazirine species is produced in each case (except for the diphenyl este) by more than one process. Formation of what is formally the aryl amine radical ion occurs by a novel hydrogen rearrangement. Simple cleavage of the bonds β to either the aromatic ring or the CN moiety also produces abundant ions. The diphenyl ester behaves anomalously yielding the phenol ion instead of the amine. The proposed mechanisms were confirmed by metastable studies, deuterium labelling and exact mass measurements.

📜 SIMILAR VOLUMES

Electron impact induced fragmentation of
Electron impact induced fragmentation of some 1,2,4-triazole derivatives
✍ R. Krishna Mohan Rao Kallury; Pramod V. Upadhyaya; Tumbalam G. Surendra Nath; Va 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 357 KB

## Abstract The mass spectra of eight 1,2,4‐triazole derivaties have been recorded and found tao reveal extensive hydrogen and skeletal migrations. The structures of the fragments have been confirmed by deuterium labelling and exact mass measurement. The compounds revealed striking differences in t

Fragmentation of O-isopropylidene deriva
Fragmentation of O-isopropylidene derivatives of 1,2-Diols on electron impact
✍ J. -F. Rontani; C. Aubert 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 126 KB

## OMS Letters Dear Sir, Fragmentation of 0-Isopropylidene Derivatives of 1,2-Diols on Electron Impact 1,3-Dioxolanes are often employed in organic synthesis to protect carbonyl groups and diols.1.2 The mass fragmentations of ethylene acetals of aldehydes and ketones have been intensively and all

Electron-impact fragmentation of cycloca
Electron-impact fragmentation of cyclocarbosiloxanes
✍ V. Yu. Orlov; N. S. Nametkin; L. E. Gusel'nikov; T. H. Islamov 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 300 KB

The fragmentation of six and eight membered methyl substituted cyclocarbosiloxanes of general formula (CH3)&03 -,(CH,), (n = 1 or 2) and (CH3), Si,O,-,(CH,), (n = 1, 2 or 3) under electron-impact (70 eV) is reported. The behaviour of these compounds under electron-impact is intermediate between that

The fragmentation of 2-aminooxazoles und
The fragmentation of 2-aminooxazoles under electron impact
✍ A. Selva; P. Traldi; G. Rapi; M. Ginanneschi; M. Chelli 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 396 KB

## Abstract The 70 eV electron impact mass spectra of six 2‐aminooxazoles are discussed in detail with the aid of exact mass measurements, metastable ion detection in the defocused mode and labelling experiments. The fragmentation is markedly influenced by strong electron donating substituents at t