PECULIARITIES OF MASS-SPECTROMETRIC DECAY MOLECULAR IONS OF SOME DERIVATIVES OF CHRYSAZIN

Abstract

The paper presents an analysis of the mass-spectrometric fragmentation of molecular ions of certain derivatives of 1,8-dihydroxy-9,10-anthraquinone (chrysazin) (1) containing the methyl, hydroxymethyl and carboxy group (2-4) in the 3 position of the anthraquinone system revealing the main directions of the decay of molecular ions (MI) of compounds in electron ionization, and also comparing the features of the fragmentation mechanism depending on the chemical nature of the substituent. It is shown that the considered group of compounds is characterized by an intense MI peak (I=100%), and its stability varies within Wmi = 33.350.2%. Schemes of mass spectrometric fragmentation of derivatives are proposed and it is shown that the initial elimination of two CO molecules is characteristic for MI of chrysiazin, chrysofanol and rhein.

References

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