6533b86ffe1ef96bd12cd09c

RESEARCH PRODUCT

Studies in organic mass spectrometry. Part 9—mass spectra of 9,10-disubstituted 2,3,6,7-tetraalkoxy-9,10-dihydroanthracenes: A remarkable loss of radicals from even-electron ions

Liliana LamartinaLeopoldo CerauloMaria Concetta NatoliMirella FerrugiaPasquale Agozzino

subject

ChemistryRadicalSubstituentAnalytical chemistryMass spectrometryPhotochemistryKinetic energyBiochemistryIonchemistry.chemical_compoundFragmentation (mass spectrometry)Mass spectrumMolecular MedicineInstrumentationSpectroscopyElectron ionization

description

The electron impact-induced fragmentations of 23 9,10-disubstituted 2,3,6,7-tetraalkoxy-9,10-dihydroanthracenes, including six stereoisomeric pairs, were studied. The loss of the 9-(or 10-)substituent constitutes the main fragmentation route. The resulting ions give rise to a remarkable violation of the so-called even-electron rule as they eject the second substituent at the 10-(or 9-)position as a radical. The latter aspect was particularly investigated with the aid of low-energy (nominal value 15 eV) and mass-analysed ion kinetic energy spectra

yearjournalcountryeditionlanguage
1991-04-01Organic Mass Spectrometry
https://doi.org/10.1002/oms.1210260419