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Related Experiment Videos

3,5-Dihalo-4-hydroxybenzonitriles: isostructures, polymorphs and solvates.

Doyle Britton1

  • 1Department of Chemistry, University of Minnesota, Minneapolis, MN 55455-0431, USA. britton@chem.umn.edu

Acta Crystallographica. Section B, Structural Science
|January 26, 2006
PubMed
Summary

3,5-Dichloro-4-hydroxybenzonitrile and related compounds form chain-like structures. These structures assemble into planar sheets, demonstrating extreme two-dimensional isostructuality across bromo and iodo analogs.

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Area of Science:

  • Crystal Engineering
  • Supramolecular Chemistry
  • Materials Science

Background:

  • Halogenated benzonitriles are known for their diverse crystal structures.
  • Understanding intermolecular interactions is key to designing novel materials.

Purpose of the Study:

  • To investigate the crystal structures of 3,5-dichloro-4-hydroxybenzonitrile and its dibromo and diiodo analogs.
  • To explore the phenomenon of two-dimensional isostructuality in these compounds.

Main Methods:

  • Single-crystal X-ray diffraction was used to determine the molecular and crystal structures.
  • Analysis of intermolecular interactions (hydrogen bonding, halogen bonding) was performed.

Main Results:

  • 3,5-Dichloro-4-hydroxybenzonitrile forms chain-like assemblies via OH...NC interactions.

Related Experiment Videos

  • Dibromo and diiodo analogs exhibit two polymorphs, forming planar sheets through X...X interactions.
  • These sheets display approximate p2gg 2D symmetry, indicating extreme two-dimensional isostructuality.

    • Conclusions:

    • The study highlights a rare example of extreme two-dimensional isostructuality in halogenated benzonitriles.
    • Polymorphism and stacking arrangements influence the final crystal packing.
    • Intermolecular interactions play a crucial role in dictating the observed structural motifs.