Spiro-[indene-1,1'-benzo[e]indolin]-2'-one

Area of Science:

• Organic Chemistry
• Crystallography
• Materials Science

Background:

• Understanding the structure-property relationships of organic molecules is crucial for developing new materials.
• Crystallographic studies provide atomic-level insights into molecular arrangement and intermolecular interactions.
• The compound C20H13NO presents an interesting scaffold for potential applications.

Purpose of the Study:

• To elucidate the three-dimensional molecular structure of the title compound, C20H13NO.
• To characterize the conformational preferences and intermolecular interactions within the crystal lattice.
• To provide a foundation for further research into the compound's physical and chemical properties.

Main Methods:

• Single-crystal X-ray diffraction analysis was employed to determine the crystal structure.
• The crystal structure was solved and refined using standard crystallographic software.
• Analysis of bond lengths, bond angles, dihedral angles, and intermolecular interactions was performed.

Main Results:

• The indene ring system exhibits disorder over two crystallographic sites with a specific occupancy ratio.
• The disordered indene components are nearly perpendicular to the naphthalene ring system, with dihedral angles of approximately 90.9° and 85.0°.
• The 1H-pyrrol-2(3H)-one ring adopts an envelope conformation, with the spiro carbon atom at the flap position.
• Intermolecular hydrogen bonding, including classical N-H⋯O and weak C-H⋯O interactions, was identified.

Conclusions:

• The crystal structure of C20H13NO reveals significant molecular complexity and specific packing arrangements.
• The observed disorder and near-perpendicular orientation of ring systems influence the overall molecular architecture.
• The presence of hydrogen bonding suggests potential for self-assembly and specific solid-state properties.