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1,2-Bis{2-[2-(trimethyl-sil-yl)ethyn-yl]phen-yl}ethane-1,2-dione
Christopher R Sparrow1, Frank R Fronczek, Steven F Watkins
1Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803-1804, USA.
Acta Crystallographica. Section E, Structure Reports Online
|September 13, 2012
Summary
This study details the crystal structure of a C(24)H(26)O(2)Si(2) compound, revealing its C(2) symmetry and specific dihedral and acetylene angles. The crystal packing is dominated by van der Waals forces.
Area of Science:
- Crystallography
- Solid-state chemistry
- Organic silicon compounds
Background:
- Understanding the three-dimensional arrangement of atoms in organic silicon compounds is crucial for predicting their physical and chemical properties.
- Crystallographic studies provide precise structural data, including bond lengths, bond angles, and intermolecular interactions.
- The specific compound C(24)H(26)O(2)Si(2) was selected for detailed structural analysis.
Purpose of the Study:
- To determine the precise crystal structure of the title compound C(24)H(26)O(2)Si(2).
- To analyze the molecular geometry, including dihedral angles between aromatic rings and linearity of the acetylene group.
- To investigate the nature of intermolecular interactions within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction was employed to collect diffraction data.
- The crystal structure was solved and refined using standard crystallographic software.
- Analysis of the refined structure provided details on molecular symmetry and geometry.
Main Results:
- The compound C(24)H(26)O(2)Si(2) exhibits C(2) crystallographic symmetry.
- The dihedral angle between the aromatic rings was determined to be 84.5(2)°.
- The acetylene group showed slight non-linearity, with angles of 175.7(2)° and 177.0(2)° at the carbon atoms.
Conclusions:
- The crystal structure of C(24)H(26)O(2)Si(2) is characterized by C(2) symmetry and specific geometric parameters.
- The observed molecular conformation is influenced by the arrangement of aromatic rings and the acetylene moiety.
- Intermolecular interactions in the crystal are primarily van der Waals forces, indicating weak cohesive energy.
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