ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The positive and negative ion mass spectra, at 70 eV, of p-RC6H4N(O)=NCOOCH3 (R=H, Cl, Br, NO2), C6H5N(O)=NCOOC2H5, p-RC6H4N(O)=NCONH2 (R=H, Cl, Br, NO2) and p-RC6H4N(O)=NCOC6H5 (R=H, Cl, Br, NO2) are reported. The azoxyester derivatives show abundant molecular ions and a number of weak fragment and rearrangement ions in the positive ion mass spectra, whereas weak molecular ions and abundant low mass fragment ions are present in the negative ion mass spectra. Similar behaviour is observed in the mass spectra of the azoxyamides. Conversely, for the azoxycarbonyl compounds the positive molecular ion is absent. A ready cleavage of the N—CO bond occurs and only few fragments of low diagnostic value are formed, whereas the negative molecular ion is the base peak for all these compounds with the exception of the p-NO2 derivative, where [M—O]-⋅ is the base peak and [M]-⋅ is the second major ion. The behaviour under electron impact of these classes of compounds is compared with that of azoxycyanides reported previously.
Additional Material:
3 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210141208
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