𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Stereochemical effects in mass spectrometry: Part 8-chemical ionization mass spectra of cyclic glycols and monosaccharides using formaldehyde dimethyl acetal as reagent gas

✍ Scribed by Ya-Ping Tu; Yao-Zu Chen; Su-Nian Chen; Mei-Lan Wang; Zhi-Zhong Jing


Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
282 KB
Volume
25
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis


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 ions the stereoisomers of these compounds may be definitely distinguished.


πŸ“œ SIMILAR VOLUMES


Stereochemical effects in mass spectrome
✍ Ya-Ping Tu; Guan-Yu Yang; Yu-Hua Liu; Shao-Nong Chen; Yao-Zu Chen πŸ“‚ Article πŸ“… 1991 πŸ› John Wiley and Sons 🌐 English βš– 289 KB

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 io

Stereochemical effects in mass spectrome
✍ Hou-Jun Yang; XiΘ§O-Ling Li; Yuan-Jiang Pan; Yao-Zu Chen πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 327 KB

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