N-(2-Bromo­phen­yl)-2-(naphthalen-1-yl)acetamide

In the title compound, C₁₈H₁₄BrNO, the naphthalene ring system [maximum deviation = 0.015 (3) Å] forms a dihedral angle of 67.70 (10)° with the benzene ring. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds into C(4) chains propagating in [100]. A C—H...O inter­action reinforces the chain connectivity, generating an R₂¹(6) loop.

2,2-Diphenyl-N-(2,4,5-trichloro­phen­yl)acetamide

The asymmetric unit of the title compound, C₂₀H₁₄Cl₃NO, consists of two independent mol­ecules. In one mol­ecule, the chlorinated benzene ring forms dihedral angles of 12.00 (9) and 77.04 (9)° with the phenyl rings. The dihedral angle between the phenyl rings is 80.37 (10)°. The corresponding dihedral angles for the other mol­ecule are 26.34 (10), 62.98 (10) and 88.47 (11)°, respectively. One of the mol­ecules features an intra­molecular C—H...O hydrogen bond, which forms an S(6) ring motif. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds into [100] chains. The chains are further linked by C—H...O and C—H...Cl hydrogen bonds into a three-dimensional network.

N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-2-[4-(methyl­sulfan­yl)phen­yl]acetamide

In the title compound, C₂₀H₂₁N₃O₂S, the 2,3-dihydro-1H-pyrazole ring is nearly planar (r.m.s. deviation = 0.023 Å) and forms dihedral angles of 16.96 (6) and 38.93 (6)° with the benzene and phenyl rings, respectively. The dihedral angle between the benzene and phenyl rings is 55.54 (6)°. The mol­ecular conformation is consolidated by an intra­molecular C—H...O hydrogen bond, which forms an S(6) ring. In the crystal, inversion dimers linked by pairs of N—H...O_p (p = pyrazole) hydrogen bonds generate R₂²(10) loops. The dimers are linked by C—H...O hydrogen bonds into sheets lying parallel to (100).

2-(4-Bromo­phen­yl)-N-(2,6-dimethyl­phen­yl)acetamide

In the title compound, C₁₆H₁₆BrNO, the dihedral angle between the benzene rings is 69.8 (2)°. In the crystal, N—H...O hydrogen bonds link the mol­ecules into C(4) chains propagating in [100]. Adjacent mol­ecules in the chains are also linked by C—H...O inter­actions which, along with the N—H...O hydrogen bonds, generate R₂¹(6) loops.

2-(4-Chloro­phen­yl)-N-(1,3-thia­zol-2-yl)acetamide

In the title compound, C₁₁H₉ClN₂OS, the thia­zole ring is nearly planar (r.m.s. deviation = 0.003 Å) and forms a dihedral angle of 64.18 (7)° with the bezene ring. In the crystal, inversion dimers linked by pairs of N—H...N_t (t = thia­zole) hydrogen bonds generate R₂²(8) loops.

1-(6-Chloro-1,3-benzothia­zol-2-yl)-2-[1-(4-meth­oxy­phen­yl)ethyl­idene]hydrazine

The asymmetric unit of the title compound, C₁₆H₁₄ClN₃OS, contains two independent mol­ecules (A and B) linked into dimers via N—H...N hydrogen bonds. The 1,3-benzothia­zol-2-yl ring system and the benzene ring form dihedral angles of 17.08 (8) and 8.63 (7)° in mol­ecules A and B, respectively.

(Z)-2-Benzyl­idenebenzo[d]thia­zolo[3,2-a]imidazol-3(2H)-one

The mol­ecule of the title compound, C₁₆H₁₀N₂OS, is approximately planar, the dihedral angle between the 1,3-benzothia­zolo[3,2-a]imidazol-3(2H)-one and the benzyl­idene moieties being 4.10 (8)°. A weak intra­molecular C—H...S inter­action generates an S(6) ring. No inter­molecular hydrogen bonds are observed in the crystal structure.

(2E)-3-[4-(Benz­yloxy)phen­yl]-1-(pyridin-3-yl)prop-2-en-1-one

The title compound, C₂₁H₁₇NO₂, exists in an E conformation with respect to the C=C bond. The pyridine ring forms dihedral angles of 5.57 (7) and 82.30 (9)°, respectively, with the central benzene ring and the terminal phenyl ring. The dihedral angle between the benzene and phenyl rings is 87.69 (8)°. No significant inter­molecular inter­actions are observed.

1-(1,5-Diphenyl-4-phenyl­sulfonyl-1H-pyrazol-3-yl)ethanone

The asymmetric unit of the title compound, C₂₃H₁₈N₂O₃S, contains two mol­ecules with comparable geometries. In one mol­ecule, the pyrazole ring forms dihedral angles of 61.65 (11), 47.88 (11) and 63.20 (14)° with the three benzene rings. The corresponding values for the other mol­ecule are 77.19 (11), 43.55 (11) and 63.56 (15)°. In the crystal, both mol­ecules are linked into inversion dimers by pairs of C—H...S hydrogen bonds, generating R₂²(14) loops in each case.

3-Oxo-3-(piperidin-1-yl)propane­nitrile

In the title compound, C₈H₁₂N₂O, the piperidine ring exhibits a chair conformation and its least-squares plane (all atoms) makes a dihedral angle of 32.88 (12)° with the propane­nitrile unit (r.m.s. deviation = 0.001 Å). In the crystal, mol­ecules are linked by C—H...O hydrogen bonds, forming chains along [001].

(Z)-2-(5-Acetyl-4-methyl-3-phenyl-2,3-dihydro-1,3-thia­zol-2-yl­idene)-3-(3-methyl-1-benzofuran-2-yl)-3-oxo­propane­nitrile

In the title compound, C₂₄H₁₈N₂O₃S, the benzofuran ring system (r.m.s. deviation = 0.010 Å) forms dihedral angles of 83.13 (17) and 8.92 (14)° with the benzene and thia­zole rings, respectively. The dihedral angle between the benzene and thia­zole rings is 84.51 (19)°. The mol­ecular structure features an intra­molecular C—H...O hydrogen bond, which closes an S(6) ring. There are no inter­molecular hydrogen bonds observed in this structure.