In the title compound, C(15)H(14)N(2)O(4), the dihedral angle between the two benzene rings is 4.1 (2)°. The mol-ecule adopts an E configuration with respect to the C=N bond. There are intra-molecular O-H⋯N and O-H⋯O hydrogen bonds in the mol-ecule. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O and O-H⋯O hydrogen bonds, forming chains running along the c axis.

In the title compound, C(14)H(9)Cl(2)N(3)O(4)·CH(4)O, the dihedral angle between the two benzene rings in the hydrazone mol-ecule is 6.3 (3)°. An intra-molecular N-H⋯O hydrogen bond stabilizes the mol-ecular conformation. In the crystal, centrosymmetrically related mol-ecules are linked through inter-molecular O-H⋯O and N-H⋯O hydrogen bonds.

In the mol-ecule of the title compound, C(14)H(18)O(4), the C=C double bond is in an E configuration. The mol-ecule is almost planar (r.m.s. deviation of all non-H atoms = 0.04 Å). An intra-molecular O-H⋯O hydrogen bond occurs. In the crystal, inter-molecular O-H⋯O inter-actions link the mol-ecules into ribbons extending in [110].

The title compound, C9H8N2O2S3, crystallizes with two mol-ecules (A and B) in the asymmetric unit. Both have similar conformations (overlay r.m.s. deviation = 0.209 Å) and are linked by an N-H⋯O hydrogen bond. In both mol-ecules, the thio-phene rings show orientational disorder, with occupancy factors of 0.6727 (17) and 0.3273 (17) for mol-ecule A, and 0.7916 (19) and 0.2084 (19) for mol-ecule ...

In the mol-ecular structure of the title compound, C(16)H(14)ClNO, the acrylamide unit is essentially planar and makes dihedral angles of 80.06 (12) and 68.91 (13)°, respectively, with the benzene and phenyl rings. The dihedral angle between the two rings is 49.79 (11)°. In the crystal structure, mol-ecules are connected via weak C-H⋯O and C-H⋯π inter-actions, forming a mol-ecular tape running ...

In the crystal structure of the title compound, C(15)H(13)BrN(2)O(5)·CH(3)OH, the methanol solvent mol-ecule links symmetry-related mol-ecules through O-H⋯O and N-H⋯O hydrogen bonds. Further inter-molecular O-H⋯O hydrogen bonds link symmetry-related mol-ecules, leading to the formation of a three-dimensional network. Two of the H atoms involved in hydrogen bonding are disordered. The dihedral a...

The title compound, C(14)H(11)NO(4), crystallizes with two mol-ecules in the asymmetric unit. The major conformational difference between these two mol-ecules is the dihedral angle between the aromatic rings, namely 36.99 (5) and 55.04 (5)°. The nitro groups are coplanar with the phenyl rings to which they are attached, the O-N-C-C torsion angles being -1.9 (3) and 1.0 (3)° in the two mol-ecules.

In the title compound, C(14)H(10)ClN(3)O(4)·CH(3)OH, the dihedral angle between the two benzene rings is 33.9 (2)°. In the crystal structure, the methanol solvent mol-ecules are linked to the Schiff base mol-ecules through inter-molecular N-H⋯O and O-H⋯O hydrogen bonds. Mol-ecules are further linked through inter-molecular O-H⋯O and O-H⋯N hydrogen bonds, forming chains running along the b axis.