Crystal structure of an acetonitrile solvate of 2-(3,4,5-triphenylphenyl)acetic acid

Crystal growth of 2-(3,4,5-triphen-ylphen-yl)acetic acid (<b>1</b>) from aceto-nitrile yields a monosolvate, C₂₆H₂₀O₂·CH₃CN, of the space group <i>P</i>1. In the crystal, the title mol-ecule adopts a conformation in which the three phenyl rings are arranged in a paddlewheel-like fashion around the central arene ring and the carboxyl residue is oriented nearly perpendicular to the plane of this benzene ring. Inversion-symmetric dimers of O-H⋯O-bonded mol-ecules of <b>1</b> represent the basic supra-molecular entities of the crystal structure. These dimeric mol-ecular units are further linked by C-H⋯O=C bonds to form one-dimensional supra-molecular aggregates running along the crystallographic [111] direction. Weak C_ar-yl-H⋯N inter-actions occur between the mol-ecules of <b>1</b> and aceto-nitrile.