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LThe isomeric [C2,N,02]+ ions OCNCO+, OCCNO+, and NCCO, have been generated and structurally characterized on the basis of their collisional activation, charge reversal, and neutralization-reionization mass spectra. The open-shell neutrals formed in the neutralization step undergo facile unimolecular decomposition. A recovery signal is obtained only for OCCNO.1.
--In recent years, we have used the technique of neutralization-reionization mass spectrometry ['] to characterize cumulenes of theoretical and cosmochemical interest". Much of this work has concentrated on sulfides, oxides, and nitrides of carbon. A logical extension of this work is a study of cumulenes containing multiple heteroatoms. However, the more heteroatoms the molecule of interest contains, the more difficult it becomes to distinguish between isomeric species. In such instances it is desirable to generate and study several structural isomers.Here we report that three different [C2,N,02]+ ions may be clearly distinguished by using collisional mass-spectrometry techniques. Surprisingly, the smaller [C,N,02] + system is less clear.
Results and DiscussionA number of compounds give rise to [C2,N,02]+ ions. For instance, the cyclic amides succinimide (1) and parabanic acid (2) as well as azoformamide (3) and ethyl chlo-
~~The neutral molecules nitrosoformaldehyde (la), 1-nitrosoacetaldehyde (Ib), and 2,2,2-trifluoro-1-n1troso-acetaldehyde (lc) have been generated and detected by neutralization-reionization mass spectrometry (NR-MS)
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