𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Mass spectrometry of pyrimidine derivatives: Electron impact-induced decomposition of molecular ions of 4-amino-substituted and 4-amino-disubstituted 1,2-dihydro-1-methylpyrimidin-2-ones

✍ Scribed by Adam S. Plaziak; Lech Celewicz; Krzystof Ciszewski; Krzysztof Golankiewicz

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
365 KB
Volume
26
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

Electron impact (El) mass spectra of fourteen Qamino-substituted 1,2aihydro-l-methylpyrimidibZoaes are reported. The EI-induced decomposition of their molecular ions is significantly dependent on the chemical nature of the substitwnts. The routes of mass decomposition established suggest the presence of the tautomeric forms in the gas phase of some investigated compounds.

📜 SIMILAR VOLUMES

Mass spectrometry of some new pyrimidine
Mass spectrometry of some new pyrimidine derivatives: Electron impact-induced decomposition of 5-alkyl-5-acylamino-6-imino-1,2,5,6-tetrahydro-2(1H)-thioxopyrimidin-4(3H)-ones
✍ Adam S. Plaziak; Bozenna Golankiewicz; Joanna Zeidler; Krzysztof Golankiewicz 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 258 KB

The mass fragmentation of some new 5-substituted derivatives of Cimino-1,2,5,Ctetrahydro-2(1~ thioxopyrimidin-4(3H)-one are reported. Electron impact-induced decompositions occurred primarily on the substituents localized in the Iposition of the series.

Electron impact mass spectra of 1,3,4-th
Electron impact mass spectra of 1,3,4-thiadiazolo[3,2-a]pyrimidin-7-one and isomeric-5-one derivatives
✍ S. Foti; F. Russo; A. Santagati; M. Santagati 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 401 KB

## Abstract The 70 eV electron impact mass spectra of some 1,3,4‐thiadiazolo[3,2‐__a__]pyrimidin‐7‐one and isomeric‐5‐one derivatives are discussed with the aid of defocused metastable spectra and exact mass measurements. The compounds are shown to be very stable to electron impact and ring contrac