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
Isomerization of phytyl ethers on electron impact
β Scribed by J.-F. Rontani
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 104 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1076-5174
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Phenyl allenyl ethers undergo Claisen rearrangement under electron impact conditions producing intense [ M -COl ions. Another competing fragmentation pathway in these compounds is an intramolecular aromatic substitution followed by the loss of H or the substituent to give rise to fragments correspon
Six structurally related crown ethers have been studied by electron impact @I) mass spectrometry. From accurate mass measurements, metastabel ion and mass-analyzed ion kinetic energy (MIKE) spectra, plausible fragmentation pathways were deduced. All compounds showed very abundant molecular ions and