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A metastable ion study of the electron impact fragmentation of some substituted 2,6-pyrido-containing crown ethers

✍ Scribed by S. N. Chen; M. L. Wang; S. C. Chen; Z. Z. Jing; M. A. Baldwin; C. T. Wu; X. J. Wang

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
268 KB
Volume
22
Category
Article
ISSN
1076-5174

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✦ Synopsis

Extensive networks of metastable ions link the major peaks in the electron impact mass spectra of two crown ethers containing 2,6-pyrido units. High-resolution mass measurements and the metastable peaks allow the elucidation of the fragmentation pathways. The spectra are influenced more by the presence of aromatic substituents than by the 2,6-pyrido units.

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Electron-impact Induced Fragmentation of
Electron-impact Induced Fragmentation of the Isomeric 2- and 4-Oxo-6,7,8,9-tetrahydro-pyrido[1,2-a]pyrimidines
✍ Tünde E. Takácsy; József Tamás (deceased); István Hermecz; Katalin Kovács 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 144 KB 👁 1 views

The mass spectrometric behaviour of the isomeric 2-and 4-oxo-6,7,8,9-tetrahydro-pyrido[1,2-a]pyrimidines have been studied in detail under electron-impact induced ionization. Differences in the main fragmentation routes of the two isomeric compounds have been established by high resolution mass meas