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The electron ionization-induced fragmentation patterns of five diols (with H, F, Cl, Br, I substituents in para positions of phenyls) have been studied, especially the title processes. Alternation of dehydroxylation and decarbonylation processes has been found. The elimination of CO causes a rearrangement of the neighbouring aryl and H. The formation of cumulene ions is possible from M(+*)-H(2)O and M(+*)-H(2)O, X* ions. It has been shown that the acetylenic bond has the ability to hold Ph*", PhX* (X=halogen), CeH4, H. The halogen (type), in comparison with the unsubstituted diol, introduces quantitative and not qualitative changes. With a decrease in the induction effect of the halogen, the relative intensity (%) of fragment ions increases, especially of those having small m/z values.
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Tom
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323--334
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Bibliogr. 10 poz.
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- Spectrscopic Research Group (Formerly Instrumental Analysis Laboratory), Laboratory of Technological Processes, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warszawa (Zespół Naukowy Badań Spektralnych [Dawniej: Międzyins
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bwmeta1.element.baztech-article-BPP1-0030-0028