Mass spectrometry of quinones. Part I. Reactions of 1,2-naphthaquinones in the mass spectrometer

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Abstract
The mass spectra of eleven 1,2-napthaquinones variously substituted with bromo-, chloro-, carboxyl, and methoxyl groups are reported and discussed. Evidence is presented for the chemical reduction of the quinones in the mass spectrometer. Fragmentation patterns are suggested, which differ from those found in 1,4-naphthaquinones, and these can be correlated with the type and position of substituents in the bicyclic system.

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