The fragmentation of isotetronic acid O-methyl ethers under electron impact
β Scribed by C. C. Bonini; C. Iavarone; C. Trogolo; G. A. Poulton
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 300 KB
- Volume
- 16
- Category
- Article
- ISSN
- 1076-5174
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It is shown that fragmentation under electron impact of binuclear crown ethers is similar to those for crown ethers with the general formula L-crown-n except for the formation of fragment ions with mass numbers reflecting the ring sizes in binuclear crown ether molecules. The formation of these ions
## Abstract The 70 eV electron impact mass spectra of six 2βaminooxazoles 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
Electron impact (EI) spectra of polymethylene-bridged carbonylhydrazones of 4'-formylbis(benzo-15crown-5 ether)s, their 18-crown-6 analogs, and their complexes with alkali cations (Na , K , and Cs ) were studied. Evidently, there are three main routes of fragmentation, including two types of McLaffe