[2-(1,3-Benzothia­zol-2-ylmeth­oxy)-5-bromo­phen­yl](4-chloro­phen­yl)methanone

In the title compound, C₂₁H₁₃BrClNO₂S, the dihedral angle between the planes of the benzothia­zole and chloro­phenyl­methanone groups is 71.34 (6)°. In the crystal, weak C—H...N hydrogen bonds lead to dimer formation, whereas Br...Cl short contacts [3.4966 (11) Å] form infinite chains along the a-axis direction. Further, the C—H...O, C—H...π and π–π [centroid–centroid distance = 3.865 (2) Å] inter­actions stabilize the three-dimensional network.

Methyl 4-(4-chloro­phen­yl)-8-iodo-2-methyl-6-oxo-1,6-dihydro-4H-pyrimido[2,1-b]quinazoline-3-carboxyl­ate

In the title compound, C₂₀H₁₅ClIN₃O₃, the dihedral angle between the quinazolinone ring system [r.m.s. deviation = 0.047 (2) Å] and the pendant benzene ring is 82.63 (11)°. The mol­ecular conformation is stabilized by intra­molecular C—H...O inter­actions. In the crystal, the mol­ecules are linked by N—H...O hydrogen bonds into chains along the a-axis direction. Another set of chains propagating along [101] is formed due to inter­molecular I...Cl short contacts of 3.427 (1) Å, thus giving layers parallel to (010). The layers are connected by C—H...π and π–π inter­actions, the shortest distance between the centroids of aromatic rings being 3.8143 (16) Å.

2-(4-Bromo­anilino)-6-(4-chloro­phen­yl)-5-meth­oxy­carbonyl-4-methyl-3,6-dihydro­pyrimidin-1-ium chloride

In the title molecular salt, C₁₉H₁₈BrClN₃O₂⁺·Cl⁻, the dihedral angles between the pyrimidine ring and the chlorobenzene and bromobenzene rings are 72.4 (2) and 45.5 (2)°, respectively. The dihedral angle between the chlorobenzene and bromobenzene rings is 27.5 (2)°. The conformation of the mol­ecule is stabilized by an intra­molecular C—H...O inter­action. In the crystal, the anion and cation are linked by an N—H...Cl hydrogen bond. Pairs of weak C—H...O and C—H...Cl hydrogen bonds form inversion dimers. Further N—H...Cl hydrogen bonds form R₂¹(6) motifs and link the dimers into chains along [101]. Br...Cl short contacts [3.482 (2) Å] inter­link the hydrogen-bonded chains along the b-axis direction.

{2-[(1,3-Benzo­thia­zol-2-yl)meth­oxy]-5-bromo­phen­yl}(phen­yl)methanone

In the title compound, C₂₁H₁₄BrNO₂S, the dihedral angle between the planes of the benzo­thia­zole and phenyl­methanone groups is 63.4 (2)°. In the crystal, pairs of C—H...N hydrogen bonds link the mol­ecules to form inversion dimers, which are further linked by C—H...O inter­actions into chains along the c axis. C—H...π and π–π inter­actions [centroid–centroid distance = 3.863 (1) Å] further stabilize the mol­ecular assembly.

{2-[(1,3-Benzo­thia­zol-2-yl)meth­oxy]-5-fluoro­phen­yl}(4-chloro­phen­yl)methanone

The asymmetric unit of the title compound, C₂₁H₁₃ClFNO₂S, contains two independent mol­ecules with similar conformations. In the mol­ecules, the thia­zole ring is essentially planar [maximum atomic deviations = 0.014 (4) and 0.023 (5) Å] and is oriented with respect to the fluoro­phenyl ring and chloro­phenyl rings at 9.96 (18) and 70.39 (18)° in one mol­ecule and at 7.50 (18) and 68.43 (18)° in the other; the dihedral angles between the fluoro­phenyl and chloro­phenyl rings are 64.9 (2) and 64.6 (2)°, respectively. Inter­molecular C—H...O and C—H...F hydrogen bonds stabilize the three-dimensional supra­molecular architecture. Weak C—H...π and π–π inter­actions [centroid–centroid distance = 3.877 (3) Å] lead to a criss-cross mol­ecular packing along the c axis.

{2-[(1,3-Benzo­thia­zol-2-yl)meth­oxy]-5-chloro­phen­yl}(4-chloro­phen­yl)methan­one

In the title compound, C₂₁H₁₃Cl₂NO₂S, the benzo­thia­zole ring makes dihedral angles of 0.94 (1) and 70.65 (5)° with the 4-chloro­phenyl­methanone unit and the 5-chloro­phenyl ring, respectively. The dihedral angle between the 4-chloro­phenyl­methanone unit and the 5-chloro­phenyl ring is 66.20 (5)°. The crystal structure consists of dimeric units generated by C—H...N hydrogen bonds, further linked by C—H...O and C—H...π inter­actions, leading to a three-dimensional network.