2-(3-Oxo-1,3-dihydroisobenzofuran-1-ylamino)benzoicacid

Abstract

In the molecule of the title compound, C15H11NO4, the essentially planar phthalide group is oriented at a dihedral angle of 56.78 (5)degrees with respect to the substituted aromatic ring. An intramolecular N-H center dot center dot center dot O hydrogen bond results in the formation of a non-planar six-membered ring, which adopts a nearly flattened-boat conformation. In the crystal structure, intermolecular C-H center dot center dot center dot O, O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds link the molecules, generating centrosymmetric R-2(2)(8) and R-2(2)(11) ring motifs and forming a three-dimensional network.