(1Z)-1-(2,4-Dichloro­phen­yl)ethan-1-one semicarbazone

In the title compound, C9H9Cl2N3O, the semicarbazone group is approximately planar, with an r.m.s deviation from the mean plane of 0.011 (2) Å. The dihedral angle between the least-squares planes through the semicarbazone group and the benzene ring is 38.76 (9)°. The crystal structure is further stabilized by N—H⋯O and C—H⋯O hydrogen bonding

Diethyl 4-[5-(4-chloro­phen­yl)-1H-pyrazol-4-yl]-2,6-dimethyl-1,4-dihydro­pyridine-3,5-dicarboxyl­ate

In the title compound, C22H24ClN3O4, intra­molecular C—H⋯O and C—H⋯N hydrogen bonds form S(9) and S(7) ring motifs, respectively. The 1,4-dihydro­pyridine ring adopts a flattened boat conformation. The benzene ring makes a dihedral angle of 33.36 (6)° with the pyrazole ring. In the crystal, pairs of N—H⋯N hydrogen bonds link the mol­ecules into inversion dimers. The dimers are stacked in column along the a axis through N—H⋯O and C—H⋯N hydrogen bonds. The crystal packing also features C—H⋯π inter­actions involving the pyrazole ring

2-(4-Chloro­phen­yl)-2-oxoethyl 3,4-dimeth­oxy­benzoate

In the title compound, C17H15ClO5, the benzene rings forms a dihedral angle of 74.45 (10)°. In the crystal, mol­ecules are linked into C(13) chains along [011] via C—H⋯O hydrogen bonds. The crystal packing also features short Cl⋯Cl contacts of 3.1253 (10) Å

2-(4-Chloro­anilino)-1-(4-chloro­phen­yl)ethanone

In the title compound, C14H11Cl2NO, the benzene rings form a dihedral angle of 3.14 (6)°. Overall, the mol­ecule is close to being planar (r.m.s. deviation for all the non-H atoms = 0.054 Å). No significant directional inter­molecular inter­actions are observed in the crystal structure

Diethyl 4-[2-(4-meth­oxy­phen­yl)-1H-pyrazol-3-yl]-2,6-dimethyl-1,4-dihydro­pyridine-3,5-dicarboxyl­ate

In the title compound, C23H27N3O5, the pyrazole ring is inclined at dihedral angles of 38.16 (6) and 80.80 (6)°, respectively, to the least-squares planes of the benzene and dihydro­pyridine rings. In the crystal, adjacent mol­ecules are linked via a pair of N—H⋯N hydrogen bonds, forming an inversion dimer. The dimers are stacked in a column along the a axis through N—H⋯O hydrogen bonds. Intra- and inter­molecular C—H⋯N and C—H⋯O hydrogen bonds are also observed

Diethyl 4-[5-(biphenyl-4-yl)-1H-pyrazol-4-yl]-2,6-dimethyl-1,4-dihydro­pyridine-3,5-dicarboxyl­ate ethanol monosolvate

In the title compound, C28H29N3O4·C2H6O, the benzene ring makes dihedral angles of 33.72 (13) and 32.86 (13)°, respectively, with the adjacent pyrazole and phenyl rings. In the crystal, the components are connected via inter­molecular N—H⋯O, N—H⋯N, O—H⋯O and C—H⋯O hydrogen bonds, forming a layer parallel to the bc plane

4-Amino-3-(p-tolyl­oxymeth­yl)-1H-1,2,4-triazole-5(4H)-thione

In the title triazole compound, C10H12N4OS, the triazole ring is essentially planar [maximum deviation = 0.009 (1) Å] and forms a dihedral angle of 5.78 (4)° with the benzene ring. In the crystal structure, mol­ecules are linked into dimers by centrosymmetric N—H⋯S inter­actions. These dimers are linked into two-mol­ecule-wide tapes by N—H⋯N and S⋯S [3.2634 (3) Å] inter­actions. In addition, they are further inter­connected by weak N—H⋯S inter­actions into sheets parallel to the ab plane. The crystal structure is further stabilized by weak inter­molecular C—H⋯π inter­actions

2-Chloro-4-methyl­pyridin-3-amine

Geometric parameters of the title compound, C6H7ClN2, are in the usual ranges. The mol­ecular structure shows one intra­molecular N—H⋯Cl contact and the crystal packing is stabilized by an inter­molecular N—H⋯N hydrogen bond

4-Amino-3-(1-naphthyl­oxymeth­yl)-1H-1,2,4-triazole-5(4H)-thione

In the title compound, C13H12N4OS, the dihedral angle between the triazole and naphthalene ring systems is 67.42 (5)°. In the crystal, adjacent mol­ecules are linked via two pairs of inter­molecular N—H⋯S inter­actions, forming R 2 2(8) and R 2 2(10) ring motifs. Weak C—H⋯S inter­actions generate infinite chains along [001] and the structure is further consolidated by C–H⋯π bonds and aromatic π⋯π stacking inter­actions [distance between the centroids of the triazole rings = 3.2479 (7) Å]

(2E)-1-(3-Methyl-2-thien­yl)-3-(3-nitro­phen­yl)prop-2-en-1-one

Chalcones are a major class of natural products having inter­esting pharmaceutical activities. The title compound, C14H11NO3S, is of inter­est as a potential bioactive agent. The central acyclic C=C double bond is trans configured. All non-H atoms lie in a common plane (r.m.s. deviation 0.075 Å). In the crystal structure, the mol­ecules form a herringbone pattern