Nuclear magnetic resonance investigations of the Azo-Hydrazone tautomerism of azoreactive dye chromophores

Csaba Szántay, Zsuzsanna Csepregi, Péter Aranyosi, István Rusznák, László Toke, András Víg

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

High-field 1H and 13C NMR methods (e.g. 1H{1H} and 13C{1H} NOE spectroscopy) were used to examine the tautomeric characteristics, particularly with regard to the question of azo-hydrazone tautomerism, of two azo dyes. Full 1H and 13C NMR signal assignments are given for both molecules. The NMR results indicate that in DMSO solution the tautomeric equilibria are shifted predominantly toward the hydrazone from II in both compounds. The presence of a fast II ⇋ III interconversion could also be plausibly assumed.

Original languageEnglish
Pages (from-to)306-310
Number of pages5
JournalMagnetic Resonance in Chemistry
Volume35
Issue number5
DOIs
Publication statusPublished - May 1997

Keywords

  • Azo-hydrazone tautomerism
  • C NMR
  • Dye chromophores
  • H NMR
  • NMR
  • NOE

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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