2-Chloro-4-{(E)-[(4-chloro­phen­yl)imino]­meth­yl}phenol

In the title Schiff base compound, C13H9Cl2NO, the dihedral angle between the mean planes of the benzene rings is 10.20 (10)°. The crystal structure is stabilized by O—H⋯N hydrogen bonds and weak π–π stacking inter­actions [centroid–centroid distance = 3.757 (1) Å]

(E)-2-[(2,4-Dichloro­phen­yl)imino­meth­yl]benzene-1,4-diol monohydrate

The title compound, C13H9Cl2NO2·H2O, represents a Schiff base which adopts the phenol–imine tautomeric form in the solid state. The mol­ecule is approximately planar (r.m.s. deviation 0.0818 Å), and the dihedral angle between the two aromatic rings is 7.46 (12)°. An O—H⋯N inter­action generates an S(6) ring. In the crystal, mol­ecules are linked by inter­molecular O—H⋯O hydrogen bonds involving the solvent water mol­ecule, forming chains

(E)-2-[3-(Trifluoro­meth­yl)phenyl­imino­meth­yl]benzene-1,4-diol

In the title compound, C14H10F3NO2, the two benzene rings are oriented at a dihedral angle of 31.94 (14)°. An intra­molecular O—H⋯N hydrogen bond helps to stabilize the mol­ecular structure. In the crystal, inter­molecular O—H⋯O hydrogen bonding links the mol­ecules, forming chains running along the crystallographic a axis. The F atoms of the trifluoro­methyl group are disordered over two positions with refined site occupancies of 0.488 (5) and 0.512 (5)

(E)-2-[(2,4-Dichloro­phen­yl)imino­methyl]-6-methyl­phenol

The title compound, C14H11Cl2NO, is a Schiff base which adopts the phenol–imine tautomeric form in the solid state. There are two mol­ecules in the asymmetric unit. Head-to-tail π–π inter­actions [centroid-to-centroid distances of 3.682 (2), 3.708 (2), 3.904 (2) and 3.910 (2) Å] between adjacent mol­ecules produce two symmetry-independent infinite chains running along the b axis

3,5-Dibenzoyl-2,6-dimethyl-1-pentyl-4-pyridone

In the crystal structure of the title compound, C26H27NO3, a one-dimensional network of C—H⋯O hydrogen bonds and π-ring inter­actions is responsible for crystal stabilization. Inter­molecular hydrogen bonds and C—H⋯ π inter­actions produce R 2 2(10), R 4 4(27) and R 4 4(29) rings

2-[(4-Ethyl­phen­yl)imino­meth­yl]-3,5-dimethoxy­phenol

The title compound, C17H19NO3, adopts the phenol–imine tautomeric form, with a resonance-assisted O—H⋯N intra­molecular hydrogen bond [O⋯N = 2.551 (3) Å]. The dihedral angle between the two benzene rings is 45.42 (7)°. The two meth­oxy groups are coplanar with the attached benzene ring [C—O—C—C torsion angles = −1.1 (5) and 3.2 (4)°]

3,5-Dimeth­oxy-2-[(4-propyl­phen­yl)imino­meth­yl]phenol

The title compound, C18H21NO3, crystallizes in the phenol–imine tautomeric form, with the H atom attached to oxygen rather than on nitro­gen. This H atom is involved in a strong intra­molecular O—H⋯N hydrogen bond. A C—H⋯π inter­action is also present. The dihedral angle between the aromatic rings is 12.23 (7)°

(E)-2-[(4-Iodo­phen­yl)imino­meth­yl]-6-methyl­phenol

The title compound, C14H12INO, adopts the phenol–imine tautomeric form. The dihedral angle between the aromatic rings is 20.6 (3)°. The mol­ecular conformation is stabilized by an intra­molecular O—H⋯N hydrogen bond while in the crystal, weak inter­molecular C—H⋯O hydrogen bonds link the mol­ecules into a zigzag chain parallel to the b axis