Dimethyl ether (DME) is a useful reagent gas for the characterization of a variety of diverse biologically important or environmentally signiรcant classes of compounds. In this work the gas-phase ion-molecule reactions of DME with 23 a-amino acids were investigated and the collision-induced dissocia
Dimethyl ether and dimethyl-d6 ether chemical ionization mass spectrometry of nitramines, nitroaromatics and related compounds
โ Scribed by Elizabeth P. Burrows
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 447 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1076-5174
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โฆ Synopsis
Abstract
Dimethyl ether (DME) chemical ionization mass spectrometry with introduction by direct exposure desorption was utilized for the characterization of a variety of nitramines, nitroaromatics and related compounds. For the nitramines and for many of the nitroaromatics the most abundant ions were fragmentโmolecule adduct ions resulting from ionโmolecule reactions with the reagent gas. Nitroaromatic positional isomers were readily distinguished by large differences in the abundances of the various adduct ions. For the nitramines, collisionโinduced dissociations of the prominent methoxymethylene adduct ions were studied and contrasted with those of the corresponding adducts derived from DMEโd~6~ as reagent gas.
๐ SIMILAR VOLUMES
The gas-phase reactions of dimethyl ether (DME) ions with a number of biologically active arylalkylamines of the general formula R 1 R 2 C 6 H 3 CHR 3 (CH 2 ) n NR 4 R 5 , where R 1 = H or OH, R 2 = H, F, NO 2 , OH or OCH 3 , R 3 = H or OH, R 4 and R 5 = H or CH 3 , have been studied by means of che
## Abstract The chemical ionization mass spectra of the isomeric 2,4โadamantanediol diacetates and dimethyl ethers have been determined using methane and isobutane as reagent gases. The significant differences in the spectra of the diacetates allow an unambiguous identification of the isomers. The