MASS-SPECTROMETRIC BEHAVIOR OF 9-HYDROXY-10-NITROSOPHENANTHRENE AND ITS DIAZA ANALOGS

Article abstract of DOI:10.1007/BF00633506

According to mass-spectral data, 9-hydroxy-10-nitrosophenanthrene in the gas phase exists primarily in this tautomeric form rather than in the 9-oxo-10-hydroxyimino tautomeric form, while passing to its 4,5-diaza and, particularly, its 1,8-diaza analogs shifts the equilibrium sharply to favor the o-quinoid form.The character of the fragmentation of the molecular ions of the polycyclic compounds differs markedly from the fragmentation of the acyclic rearrangement product - 2-carboxy-2'-cyanobiphenyl.