Chemistry of Heterocyclic Compounds

, Volume 14, Issue 8, pp 865–869 | Cite as

Chemical peculiarities and structure of 2-(indane-1′, 3′-dionid-2′-yl)pyridinium (α-pyrophthalone)

  • A. A. Kemme
  • M. F. Bundule
  • Ya. Ya. Bleidelis
  • É. É. Liepin'sh
  • É. S. Lavrinovich
  • Yu. É. Fridmanis


The fine structure of 2-(indane-1′,3′-dionid-2′-yl)pyridinium (α-pyrophthalone) was determined by PMR spectroscopy and x-ray diffraction analysis. The α-pyrophthalone molecule is almost planar; the dihedral angle between the pyridine ring and the indanedione ring is 5°. The structure is stabilized by an intramolecular hydrogen bond with a length of 2.73 Å. The molecules are packed in the crystal at van der Waals distances similar to those in molecular self-complexes. The data obtained for α-pyrophthalone confirm a dipolar ion structure.


Hydrogen Spectroscopy Indanedione Hydrogen Bond Organic Chemistry 
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Copyright information

© Plenum Publishing Corporation 1979

Authors and Affiliations

  • A. A. Kemme
    • 1
  • M. F. Bundule
    • 1
  • Ya. Ya. Bleidelis
    • 1
  • É. É. Liepin'sh
    • 1
  • É. S. Lavrinovich
    • 1
  • Yu. É. Fridmanis
    • 1
  1. 1.Institute of Organic SynthesisAcademy of Sciences of the Latvian SSRRiga

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