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Russian Chemical Bulletin

, Volume 44, Issue 1, pp 99–101 | Cite as

Low-temperature X-ray study of benzoid-quinoid tautomerism in crystals of 2-(N,N-diphenylhydrazinoethylidene)-3(2H)-benzo[b]thiophenone

  • I. I. Chuev
  • S. M. Aldoshin
  • V. A. Bren'
  • E. N. Shepelenko
Physical Chemistry

Abstract

An X-ray investigation of 2-(N,N-diphenylhydrazinoethylidene)-3(2H)-benzo[b]thiophenone was performed at room and low (−80 °C) temperatures. It was established that the structure of this compound in the crystalline state at R-20 °C is intermediate between the ketoenehydrazine and hydroxyhydrazone forms, while at −80 °C the molecular structure is completely transformed to the hydroxyhydrazone form. This confirms the dynamic nature of hydrogen atom disordering in the molecule at ∼20 °C.

Key words

2-(N,N-diphenylhydrazinoethylidene)-3(2H)-benzo[b]thiophenone, molecular structure tautomerism dynamic disordering in crystal 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • I. I. Chuev
    • 1
  • S. M. Aldoshin
    • 1
  • V. A. Bren'
    • 2
  • E. N. Shepelenko
    • 2
  1. 1.Institute of Chemical Physics in ChernogolovkaRussian Academy of SciencesChernogolovka, Moscow RegionRussian Federation
  2. 2.Scientific Research Institute of Physical and Organic Chemistry at the Rostov State UniversityStachkiRussian Federation

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