13C n.m.r. investigation on the first and second nitrogen protonation in the diazanaphthalenes

Peter van de Weijer, Dirk M.W. van den Ham, Douwe van der Meer

    Research output: Contribution to journalArticleAcademic

    16 Citations (Scopus)

    Abstract

    The 13C chemical shifts of the diazanaphthalenes have been recorded as a function of the pH value, providing classical titration curves. From these curves the pK1 and pK2 values have been determined taking into account the activity coefficients. The changes in 13C chemical shift under the influence of nitrogen protonation (Δδ) can be described by two protonation parameter sets.
    Original languageEnglish
    Pages (from-to)281-284
    JournalOrganic Magnetic Resonance
    Volume9
    Issue number5
    DOIs
    Publication statusPublished - 1977

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