Research on Chemical Intermediates

, Volume 40, Issue 8, pp 2729–2736 | Cite as

1H NMR spectroscopic investigation of the kinetics of the equilibrium between Z and E isomers

  • Sayyed Mostafa Habibi-Khorassani
  • Malek Taher Maghsoodlou
  • Ali Ebrahimi
  • Elham Aghdaei
  • Mohammad Amin Kazemian


A 1H NMR spectroscopic investigation of the kinetics of the interchange process in the equilibrium between the Z and E isomers of a stable phosphorus ylide containing a 2-benzoxazolinone group has been undertaken. Activation data (k −1, k 1, k total, Ea 1, Ea −1, Ea total, ΔS #, ΔH #, and ΔG #) and thermodynamic data (K e, ΔH°, ΔG°, and ΔS°) for the forward and reverse steps of the opposing reaction were obtained experimentally.

Graphical Abstract


1H NMR Phosphorus ylide Kinetic investigation 2-Benzoxazolinone Z isomer E isomer Triphenylphosphine 



We gratefully acknowledge financial support from the Research Council of the University of Sistan and Baluchestan.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Sayyed Mostafa Habibi-Khorassani
    • 1
  • Malek Taher Maghsoodlou
    • 1
  • Ali Ebrahimi
    • 1
  • Elham Aghdaei
    • 1
  • Mohammad Amin Kazemian
    • 1
  1. 1.Department of ChemistryFaculty of Science, University of Sistan and BaluchestanZahedanIran

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