Crystal structure, Hirshfeld surface analysis, DFT and mol-ecular docking studies of 4'-(benz-yloxy)-[1,1'-biphen-yl]-3-carb-oxy-lic acid.

In the title compound, CHO, intra-molecular C- H⋯O hydrogen bonds are observed. The dihedral angles between the aromatic benzoic acid ring and the two adjacent aromatic rings are 26.09 (4) and 69.93 (8)°, while the dihedral angle between the aromatic rings connected by the C-O-C-C [torsion angle = -175.9 (2)°] link is 89.11 (3)°. In the crystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds generate (8) ring motifs. These dimers are further linked by C-H⋯π inter-actions, forming mol-ecular sheets along (010). The mol-ecular structure was optimized by density functional theory (DFT) at the B3LYP/6-311+ G(d,p) level and the bond lengths, angles and torsion angles were compared with experimental values obtained by X-ray diffraction. The HOMO and LUMO were calculated, the energy gap between them being 4.3337 eV. Further, the inter-molecular inter-actions were qu-anti-fied using Hirshfeld surface analysis and fingerprint plots and energy frameworks were generated. The two-dimensional fingerprint plots indicate that the major contributions to the crystal packing are from H⋯H (39.7%), H⋯C (39.0%) and H⋯O (18.0%) inter-actions. The energy framework calculations reveal that the dispersion energy ( = 201.0 kJ mol) dominates the other energies. Mol-ecular docking studies were carried out for the title compound as a ligand and the SARS-Covid-2 (PDB ID:8BEC) protein, specifically the Omicron variant, was used as a receptor giving a binding affinity of -7.6 kcal mol.