Comments on “Spectroscopic studies of keto–enol tautomeric equilibrium of azo dyes” by M. A. Rauf, S. Hisaindee and N. Saleh, published in RSC Advances 2015, 5, 18097-18110 as a Review Article

Liudmil Antonov, Poul Erik Hansen, Gert van der Zwan

Research output: Contribution to journalLetterpeer-review


The paper mentioned in the title contains inaccuracies and misleading interpretations that seriously misrepresent basic knowledge about tautomerism in azo dyes. Therefore, we aim in this Letter to correct the most obvious mistakes, to address the misrepresentation of the main issues of tautomerism, and to give a better understanding of the basic principles of the tautomerisation process
Original languageEnglish
Article number18097
JournalRSC Advances
Issue number5
Pages (from-to)67165-67167
Number of pages3
Publication statusPublished - 1 Aug 2015


  • tautomerism
  • keto-enol
  • azo dyes

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