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A simple compound with an unexpectedly complex structure: 4-pyridone 6/5-hydrate.

P G Jones1

  • 1Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Postfach 3329, 38023 Braunschweig, Germany. jones@xray36.anchem.nat.tu-bs.de

Acta Crystallographica. Section C, Crystal Structure Communications
|July 10, 2001
PubMed
Summary

The crystal structure of pyridone hydrate reveals five pyridone and six water molecules. Hydrogen bonds link pyridone chains and water layers, with C-H...O interactions completing water environments.

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Area of Science:

  • Crystallography
  • Supramolecular Chemistry
  • Materials Science

Background:

  • Pyridone and its derivatives are important heterocyclic compounds with diverse applications.
  • Understanding the hydration and crystal packing of organic molecules is crucial for predicting their properties.

Purpose of the Study:

  • To elucidate the detailed crystal structure of pyridone hydrate.
  • To investigate the hydrogen bonding network and molecular packing.

Main Methods:

  • Single-crystal X-ray diffraction analysis was employed to determine the crystal structure.
  • Analysis of intermolecular interactions, including hydrogen bonds and C-H...O interactions, was performed.

Main Results:

  • The crystal structure (C5H5NO*6/5H2O) contains five independent pyridone and six independent water molecules.

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  • The space group is P2(1), with a pseudo-centrosymmetric arrangement related to P2(1)/n.
  • Two distinct layers were identified: one with pyridone chains and another with water molecules and the fifth pyridone, linked by hydrogen bonds.

    • Conclusions:

    • The study provides a detailed understanding of the hydrogen bonding and packing in pyridone hydrate.
    • The findings contribute to the knowledge of supramolecular assembly in crystalline hydrates.
    • The presence of C-H...O interactions highlights their role in crystal engineering.