The charge-reversal (CR) mass spectra of the enolate ions of heptanal and ten isomeric heptanones, of cyclohexanone, of cycloheptanone, of isomeric methylcyclohexanones, of isomeric ethylcyclohexanones and of the isomeric monoterpene ketones camphor, fenchone, pulegone and thujone were obtained by d
Charge reversal of the enolate ions of acetaldehyde and acetone
β Scribed by Thomas A. Lehman; Maurice M. Bursey; J. Ronald Hass
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 514 KB
- Volume
- 18
- Category
- Article
- ISSN
- 1076-5174
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β¦ Synopsis
CoUisionaUy activated charge reversal of HCOCH,-and CH3COCHz-produces positive ions whose fragments M e r from those of other [GH30]+ ions formed by fragmentation of positive molecular ions, including the [GH30]' ions from 2,2-&chloroethanol, considered formerly to have the HCOCHz+ structure. The fragmentations of the charge reversed ions are concordant with the RCOCHt' structures. Least-squares correlations of the collisional activation spectra [GH30]+ are probed as a useful guide to claiming similarity or dissimilarity of ionic structure.
π SIMILAR VOLUMES
The collisional charge inversion and neutralizatio~eionization (-NR) mass spectra of the enolate ions of m/z 115 derived from the four butyl acetates, the two propyl propionates, ethyl butyrate, ethyl isobutyrate, methyl valerate, methyl 2-methylbyrate and methyl Smethylbutyrate were recorded. The m
OH+ or OD+ ions were generated by collisionally induced charge reversal of the corresponding anions and then submitted to collisionally induced dissociation to H+ and D+. The resulting ion kinetic energy spectra showed multiple vibrational time structure which were assigned to pred~sociations from t