## Abstract The chemical ionization mass spectra of cyclic glycols and monosaccharides using formaldehyde dimethyl acetal as reagent gas have been studied. In the gas phase, the stereospecific reaction of methylene acetal formation was observed. From the relative abundances of the characteristic io
Stereochemical effects in mass spectrometry. Part 10-reaction mass spectrometry of cyclic glycols and monosaccharides with methylene chloride as reagent gas
β Scribed by Ya-Ping Tu; Guan-Yu Yang; Yu-Hua Liu; Shao-Nong Chen; Yao-Zu Chen
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 289 KB
- Volume
- 26
- Category
- Article
- ISSN
- 1076-5174
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β¦ Synopsis
The reaction mass spectrometry of cyclic glycols and monosaccharides with methylene chloride as reagent was studied. In the presence of ammonia, it was found that methylene chloride reacted stereoselectively with the quasimolecular ions of cyclic glycols and monosaccharides to form characteristic ions, by comparison of the relative abundances of which the stereoisomers of cyclopentane-l,%diols and cyclohexane-1,2-diols and some monosaccharides could be definitely distinguished.
π SIMILAR VOLUMES
Chemical ionization (CI) of trans-and cis-stilbene and of fumaric and maleic acid, using dichlorocarbene as reagent, was studied. In the CI ion source (CH,), dichlorocarbene added stereospecifically to the double bond of the sample molecule to form the corresponding ion of the 1,l-dichloropropane de