期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1071, 期 1-2, 页码 71-80出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2005.01.102
关键词
alkanesulfonyl chlorides; alkyl chlorides; alkanesulfonamides; positional isomers; GC/EI-MS; GC/NCI-MS; GC/PCI-MS
The photosulfochlorination of n-tetradecane by sulfuryl chloride leads to a reaction mixture containing unreacted n-tetradecane, chloro n-tetradecanes and n-tetradecanesulfonyl chlorides. Direct and simultaneous GC analysis of the mixture of the sulfochlorinated and chlorinated isomers is followed by mass spectrometry identification of all the components either by electron impact (EI-MS) and by negative and positive chemical ionisation (NCI-MS and PCI-MS). With the goal of performing an accurate quantitative GC analysis, and as n-tetradecanesulfonyl chlorides prone to degrade partially into the corresponding chlorides, the former are converted to N,N-diethylsufonamides, more stable thermally, and then analysed by GC/EI-MS and GC/PCI-MS. The chloro n-tetradecanes, sulfonylchlorides and sulfonamides spectra present strong similarities. However, some differences between terminal and internal isomers are noticed and the peculiar behaviour of sulfonamides is emphasized. (c) 2005 Elsevier B.V. All rights reserved.
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