4,4'-Dibromo-7,7'-dimeth-oxy-1,1'-spiro-biindane
Min Yao1, Yanfeng Ding, Zi-Jia Wang
1Department of Chemistry, Capital Normal University, Beijing 100048, People's Republic of China.
Summary
This study details the crystal structure of a novel spiro-biindane compound. Molecular interactions, including hydrogen bonds and pi-pi stacking, form intricate chain and layered structures in the solid state.
Area of Science:
- Crystallography
- Organic Chemistry
- Materials Science
Background:
- Spiro-biindane derivatives are of interest due to their unique structural properties.
- Understanding intermolecular forces is crucial for predicting material behavior.
Purpose of the Study:
- To elucidate the crystal structure and intermolecular interactions of a specific C(19)H(18)Br(2)O(2) compound.
- To analyze the packing arrangement and identify key bonding types.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- Analysis of hydrogen bonding (C-H⋯O) and pi-pi stacking interactions was performed.
Main Results:
- The dihedral angle between the benzene rings in the spiro-biindane core is 70.44(8)°.
- Molecules form infinite chains along the c-axis via C-H⋯O hydrogen bonds and pi-pi stacking (centroid-centroid distance = 3.893(2) Å).
- These chains further assemble into layers parallel to the bc plane through additional C-H⋯O hydrogen bonds.
Conclusions:
- The study reveals a detailed three-dimensional supramolecular architecture driven by specific non-covalent interactions.
- The findings contribute to the understanding of crystal engineering principles for spiro-biindane systems.
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