Monitoring the pH-dependent oximation of methyl ethyl ketone and benzaldehyde by in situ Fourier transform IR spectroscopy in a heterogeneous liquid-liquid two-phase system

György Keglevich, István Csontos, Nikolett Szilágyi

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In situ Fourier transform IR spectroscopy was a useful tool in monitoring the pH-dependent and two-step oximation of methyl ethyl ketone and benzaldehyde in a liquid-liquid two-phase system, one phase of which was water. Carrying out the oximations at pH 8, the oximation was complete within 45 min and the corresponding carbonyl compound-hydroxylamine adduct (2) could be detected as an intermediate, but at pH 10, the corresponding oxime (3) was formed faster, practically without the appearance of the intermediate. At pH ∼2.5 using methyl ethyl ketone, the protonated form of the corresponding oxime (3′a) developed gradually without the transient appearance of the intermediate (2). pH dependence of the 3a → 3′a and 3′a → 3a interconversions were studied in separate experiments.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalSpectroscopy Letters
Volume42
Issue number2
DOIs
Publication statusPublished - Mar 1 2009

Keywords

  • Heterogeneous phase reaction
  • In situ Fourier transform IR
  • Intermediate
  • Monitoring
  • Oximation
  • pH dependence

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

Fingerprint Dive into the research topics of 'Monitoring the pH-dependent oximation of methyl ethyl ketone and benzaldehyde by in situ Fourier transform IR spectroscopy in a heterogeneous liquid-liquid two-phase system'. Together they form a unique fingerprint.

  • Cite this