4'-Hydroxybiphenyl-4-carbonitrile

Area of Science:

• Crystallography
• Chemical Structure Analysis
• Solid-State Chemistry

Background:

• Understanding molecular arrangements in crystals is crucial for predicting material properties.
• The title compound, C13H9NO, was investigated for its crystallographic characteristics.
• Previous studies may not have fully elucidated the complex pseudosymmetry within this compound's crystal structure.

Purpose of the Study:

• To determine and describe the crystal structure of C13H9NO.
• To analyze the intermolecular interactions, specifically hydrogen bonding, within the crystal lattice.
• To characterize the pseudosymmetry present and its implications for crystallographic description.

Main Methods:

• Single-crystal X-ray diffraction was employed to obtain the crystallographic data.
• The crystal structure was solved and refined, revealing four crystallographically independent molecules.
• Analysis of hydrogen bond geometries (O-H...N) and pseudosymmetry elements was performed.

Main Results:

• The asymmetric unit contains four independent molecules of C13H9NO.
• These molecules form chains along the a axis, interconnected by O-H...NC hydrogen bonds.
• Significant pseudosymmetry was identified among the four molecules, necessitating the use of the non-standard C-1 space group for accurate description.

Conclusions:

• The crystal structure of C13H9NO exhibits complex pseudosymmetry involving four independent molecules.
• Hydrogen bonding plays a key role in organizing the molecular chains within the crystal.
• Reporting the structure in the non-standard C-1 space group provides a more precise description of the observed pseudosymmetry.