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2',7'-Di-bromo-spiro-[cyclo-propane-1,9'-fluorene]
1Department of Chemistry and Chemical Engineering, Lvliang University, Lvliang, Shanxi 033001, People's Republic of China.
Acta Crystallographica. Section E, Structure Reports Online
|August 28, 2014
Summary
This study details the crystal structure of 2,7-dibromo-9H-fluorene, revealing perpendicular planes and pi-pi interactions. These interactions facilitate molecular stacking within the crystal lattice.
Area of Science:
- Crystal Chemistry
- Organic Chemistry
- Materials Science
Background:
- Understanding the packing of organic molecules is crucial for designing new materials.
- Brominated fluorene derivatives are of interest due to their electronic properties.
Purpose of the Study:
- To elucidate the crystal structure of 2,7-dibromo-9H-fluorene.
- To investigate intermolecular interactions governing crystal packing.
Main Methods:
- Single-crystal X-ray diffraction analysis.
- Analysis of molecular geometry and intermolecular contacts.
Main Results:
- The crystal structure of 2,7-dibromo-9H-fluorene (C15H10Br2) was determined.
- Molecules adopt a unique conformation with perpendicular planes.
- Significant pi-pi interactions (inter-centroid distance = 3.699 Å) drive molecular stacking along the [001] direction.
Conclusions:
- The crystal packing is dominated by pi-pi stacking interactions.
- The specific arrangement offers insights into structure-property relationships for brominated fluorenes.
Keywords:
crystal structure