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Chemistry of Heterocyclic Compounds

, Volume 20, Issue 6, pp 680–683 | Cite as

Tautomerism of azine derivatives. 7. Thermodynamic parameters of the 1,3-prototropic tautomeric equilibrium of azahetarylmethanes

  • O. P. Petrenko
  • S. F. Bychkov
  • V. V. Lapachev
  • V. P. Mamaev
Article
  • 30 Downloads

Abstract

The constants of the hetaryl-ylidene tautomeric equilibrium in CDCl3 over a wide range of temperatures were measured for azinylmalonic and azinylcyanoacetic acid esters. High-temperature sensitivity of the position of the equilibrium for 2-pyrimidinylcyanoacetic acid esters was demonstrated. The differences in the δS values of the equilibrium for derivatives of malonic and cyanoacetic acid esters were explained by different freedoms of rotation about the exocyclic C-C bond in the aromatic tautomeric form.

Keywords

Ester Organic Chemistry CDCl3 Thermodynamic Parameter Acid Ester 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • O. P. Petrenko
    • 1
  • S. F. Bychkov
    • 1
  • V. V. Lapachev
    • 1
  • V. P. Mamaev
    • 1
  1. 1.Novosibirsk Institute of Organic Chemistry, Siberian BranchAcademy of Sciences of the USSRNovosibirsk

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