3-(4-Methoxy-phen-yl)isochroman-1-one.

In the mol-ecule of the title compound, C(16)H(14)O(3), the aromatic rings are oriented at a dihedral angle of 72.02 (6)°. The heterocyclic ring adopts a twisted conformation. In the crystal structure, there are C-H⋯π contacts between the heterocyclic and phenyl rings, and between the methyl group and methoxy-phenyl ring.

3-(4-Methoxy-benzo-yl)propionic acid.

In the crystal of the title compound, C(11)H(12)O(4), inversion dimers arise from pairs of intermolecular O-H⋯O hydrogen bonds and C-H⋯O bonds further consolidate the packing. There is also a C-H⋯π contact between the benzene ring and the methyl-ene group.

3-(3-Fluoro-benz-yl)-1H-isochromen-1-one.

The asymmetric unit of the title compound, C(16)H(11)FO(2), contains two independent mol-ecules. The isochromene ring systems are planar and are oriented with respect to the fluoro-benzene rings at dihedral angles of 87.15 (3) and 87.85 (3)° in the two mol-ecules.