Criteria for distinguishing between [M]+· and [M+H]+ ions in field desorption mass spectra
✍ Scribed by Hans-Rolf Schulten; Hans Dieter Beckey
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 138 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Ten criteria are introduced to distinguish between molecular ions and protonated parent molecules in field desorption mass spectrometry.
📜 SIMILAR VOLUMES
The formation of [ M -2HI" ions has been reported in the field desorption mass spectrometry of saturated hydrocarbons. It is shown that these ions predominantly have an alkene structure and that a field-induced ion chemistry in multimolecular or condensed layers produce [M -2nHI + ' and [2M -2rnH]+'
The presence of the [M + HI+ ions and the absence of the monomer molecular ions M" in the mass spectra of some tertiary a-and y-nitrosocarbonyl compounds is reported. This effect is caused by the rearrangement of the mobile hydrogen in the a-carbonyl position in the fragmentation pattern of the dime
The formation of ions of the cyclic depsipeptide valinomycin by field desorption has been investigated in detail. The ratio of molecular ions M+' to protonated molecules (M + HI+ has been found to be independent of emitter heating current and the nature of particular additives to the solution. In co