Resonant electron capture by C 60 and C 70 was studied and it was established that long-lived (i.e. mass spectrometrically observable) parent negative ions are formed within an extremely broad energy region (0-14 eV). It has been shown that effective yield curves of C 60 -and C 70 -in the thermal en
Resonance electron-capture mass spectra of azobenezene and its monosubstituted derivatives
β Scribed by Yury V. Vasil'ev; Viktor A. Mazunov; Eduard R. Nazirov
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 252 KB
- Volume
- 26
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
The negativeβion mass spectra of azobenezene and its derivatives were obtained using the resonance electronβcapture technique. The molecular negative ion peaks (M^βΒ·^) were found to be dominant for almost all of these compounds. Different mechanisms of formation of molecular ions in two energy regions are proposed and the pathways of fragmentation are discussed. It is shown that fragment ions are formed predominantly by direct bond breaking except for those which derive from longβlived resonance states of M^βΒ·^.
π SIMILAR VOLUMES
The fragmentation behaviour of several rotenoids functionalized in the alicyclic portions of the molecule is described.
Procedures that allow the realization of resonance electron capture (REC) mode on a commercial triplequadrupole mass spectrometer, after some simple modifications, are described. REC mass spectrometry (MS) and tandem mass spectrometry (MS/MS) experiments were performed and spectra for some compounds