Abstract
Observation and analysis of metastable transitions in the mass spectra of organic pesticidal compounds are important not only for studies concerned with the mechanism of fragmentation of ions formed in the mass spectrometer, but also provide information useful for the complete interpretation of mass spectra. Considerations of parentproduct (daughter) ion relationships resulting from metastable studies are extremely valuable if the structure of the molecule must be reconstructed from the fragments. For example, a metastable peak relating two peaks in the fragmentation spectrum indicates that these two peaks arise from one and the same substance. Further, the smaller mass fragment of the pair must of necessity be composed entirely of atoms present in the larger mass fragment from which it arose by a unimolecular reaction mechanism involving generally, simple bond fission or electron transfer.
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