HPLC of Formula: 22468-26-4. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 4-Hydroxypicolinic acid, is researched, Molecular C6H5NO3, CAS is 22468-26-4, about Gas chromatography/mass spectrometry of paraquat UV-ozonation products.
The chromatog. and mass spectral properties of 13 compounds isolated from the reaction of uv and O3 on paraquat [4685-14-7] are described. The products were extracted from the acidified reaction mixture and converted to TMS derivatives The identified products were the di-TMS ester of oxalic acid (m/z 234), the TMS ester of 4-picolinic acid (m/z 195e, the di-TMS ester of succinic acid (m/z 262e, the di-TMS derivative of N-formylglycine, 4,4′-bipyridyl (m/z 156), the tri-TMS derivative of malic acid (m/z 350), and the di-TMS derivative of a hydroxy-4-picolinic acid. Structural features and tentative identification of some of the remaining compounds are discussed. The most prominent peak on the chromatogram has a probable mol. ion at m/z 219, isomeric to the di-TMS derivative of glycine. The structures presented suggest that demethylation, ring oxidation, and fragmentation of 1 or both rings of the bipyridinium di-cation occur during uv-ozonation of paraquat.
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