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Mass spectrometric behaviour of cyclopentane-and cyclohexane-condensed pyrimidinediones under electron impact

✍ Scribed by Marja Himottu; Kalevi Pihlaja; Gábor Bernáth; Géza Stájer; Pirjo Vainiotalo

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

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✦ Synopsis

Mass spectral fragmentations of four cyclopentane-condensed cis-pyrimidinediones and of six cyclohexanecondensed cis-or trans-pyrimidinediones were examined using metastable ion analyses and exact mass measurements. The fragmentation patterns of all of these compounds were clearly different and also cis-and trans-fused isomers were easy to distinguish from each other by their mass spectra. In spite of the differences in their mass spectral fragmentations, all compounds formed phenylisocyanates (m/z 119 and 153) and anilines (m/z 93 and m/z 127), the structures of which were verified by collision-induced dissociation experiments.

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