4-[(4-Chlorophenyl)(hydroxy)methylidene]isochromane-1,3-dione

In the title compound, C16H9ClO4, the six-membered heterocyclic ring adopts a screw-boat conformation. The benzene rings are oriented to each other at a dihedral angle of 59.26 (9)°. The molecular structure exhibits a ring motif, viz. S(6), owing to an intramolecular O—H...O hydrogen bond. The presence of C—H...O contacts generates an infinite chain along [001]. Also present are π–π stacking interactions between neighbouring isochromanedione benzene rings [centroid–centroid distance = 3.746 (1) Å], and C—O...π interactions [O...centroid = 3.934 (2) Å].

Abstract licence: CC BY

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