5-[(E)-(2-Fluoro­benzyl­idene)amino]-2-hy­droxy­benzoic acid

In the title compound, C14H10FNO3, the dihedral angle between the two benzene rings is 32.66 (14)°. An S(6) ring motif is formed due to an intra­molecular O—H⋯O hydrogen bond between the hy­droxy and carbonyl groups. In the crystal, mol­ecules are consolidated into dimers with R 2 2(8) ring motifs by pairs of O—H⋯O hydrogen bonds

N-[(E)-3,4-Dimeth­oxy­benzyl­idene]-2,3-dimethyl­aniline

In the title compound, C17H19NO2, the aromatic rings are oriented at a dihedral angle of 59.27 (12)°. In the crystal, inversion dimers linked by pairs of weak C—H⋯O inter­actions generate R 2 2(12) loops

Dimethyl (1-hydr­oxy-1,2-diphenyl­ethyl)phospho­nate

In the mol­ecule of the title compound, C16H19O4P, the coordination around the P atom is distorted tetra­hedral. The aromatic rings are oriented at a dihedral angle of 72.28 (11)°. Intra­molecular C—H⋯O hydrogen bonding result in the formation of five- and six-membered rings. In the crystal structure, inter­molecular C—H⋯O hydrogen bonds link the mol­ecules. There is also a weak C—H⋯π inter­action

Dimethyl (2-hydr­oxy-4-phenyl­but-3-en-2-yl)phospho­nate

In the title compound, C12H17O4P, the phenyl­butenyl group is disordered over two sets of sites with an occupancy ratio of 0.755 (12):0.245 (12). In the crystal, inversion dimers linked by pairs of O—H⋯O hydrogen bonds occur, forming R 2 2(10) ring motifs. The packing is consolidated by weak C—H⋯π inter­actions