In the title compound, C16H12O5, synthesized from isopthaloyl chloride and 2'-hy-droxy-aceto-phenone, the dihedral angle between the planes of the aromatic rings is 71.37 (9)°. In the crystal, carb-oxy-lic acid inversion dimers generate R 2 (2)(8) loops. The dimers are linked by C-H⋯O inter-actions, generating (101) sheets.
Keywords: 2′-hydroxyacetophenone; 3-[(2-acetylphenoxy)carbonyl]benzoic acid; crystal structure; hydrogen bonding; isopthaloyl chloride.