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9,10-Bis(iodo-ethyn-yl)anthracene.

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Summary
This summary is machine-generated.

This study reveals that ethynyl-substituted anthracene derivatives form a 2D structure. Intermolecular iodine-pi interactions and pi-pi stacking influence molecular geometry and create supramolecular assemblies.

Keywords:
9,10-bis­(iodo­ethyn­yl)anthracenecrystal structurehalogen bondingπ-stacking

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Area of Science:

  • Organic Chemistry
  • Crystallography
  • Supramolecular Chemistry

Background:

  • Ethynyl-substituted anthracenes are of interest due to their unique electronic and structural properties.
  • Understanding intermolecular forces is crucial for designing novel materials with specific architectures.

Purpose of the Study:

  • To investigate the crystal structure and intermolecular interactions of an ethynyl-substituted anthracene derivative.
  • To elucidate the factors governing the formation of supramolecular structures in this class of compounds.

Main Methods:

  • Single-crystal X-ray diffraction analysis was employed to determine the molecular and crystal structure.
  • Analysis of bond angles and non-covalent interactions was performed.

Main Results:

  • The title compound, C18H8I2, exhibits distorted C-C-I bond angles deviating from linearity.
  • Significant intermolecular iodine-pi (I⋯π) interactions were identified as a key factor influencing the molecular geometry.
  • These interactions facilitate the formation of a two-dimensional supramolecular network.
  • Offset pi-pi stacking between adjacent anthracene moieties further stabilizes the observed structure.

Conclusions:

  • Intermolecular I⋯π interactions play a critical role in dictating the solid-state structure of ethynyl-substituted anthracenes.
  • The interplay between I⋯π interactions and π-π stacking leads to the formation of extended 2D supramolecular architectures.
  • This work provides insights into the rational design of organic materials based on halogen bonding and π-stacking.