91676-23-2Relevant articles and documents
MASS SPECTROMETRY OF 8-HYDROXYQUINOLINE DERIVATIVES
Ermakov, A. I.,Voronin, V. G.,Sorokin, A. A.,Epshtein, N. I.,Muravskaya, I. D.,et al.
, p. 637 - 642 (1984)
In contrast to the fragmentation of the corresponding alkyl aryl ethers, characteristic + and + fragments were observed in the fragmentation of 5-nitro(halo)-substituted 8-alkoxyquinolines.It was found by means of deuterium labeling that a hydrogen atom is split out primarily from the alkoxy group.It was demonstrated that an + fragment was from the + ion, which has a three-ring structure and quaternary nitrogen atom.The formation of an + fragment is characteristic for the fragmentation of 5(7)-nitro(halo)-substituted 8-hydroxyquinolines.The interrelationship between the intensities of the +, +, and + ion peaks and the protonation constants (pKa) of the investigated compounds is discussed.