MASS-SPECTROMETRIC INVESTIGATION OF SOME 2-SUBSTITUTED 1,4-BENZOQUINONES

Abstract

Based on the analysis of mass spectra, schemes for the fragmentation of MI of some 2-substituted 1,4-benzoquinones with the general formula (I-IX), where R = H (I), -CH3 (II), -C2H5 (III), -Cl (IV), -SCH3 (V), -C (CH3)3 (VI), -C6H5 (VII), -C6H5 (VIII), C6H4COOH (IX). It was found that most 2-substituted derivatives of 1,4-benzoquinones (I-IX) possess stable molecular ions. Fragmentation of molecular ions in ionization by electrons is inherent in many general directions, but there are some differences. For the benzoquinones studied (I-IX), the formation of ions is characteristic: [M-CO]+, [M-2CO]+,[HC≡C-R]+.

References

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