1,1-Diethyl-3-(4-meth­oxy­benzo­yl)thio­urea

In the title compound, C13H18N2O2S, the 4-meth­oxy­benzoyl fragment is approximately planar [maximum deviation = 0.057 (2) Å] and twisted relative to the thio­amide fragment, forming a dihedral angle of 86.62 (6)°. The two Csp 2—Nsp 2 bonds in the thio­urea unit differ significantly in length [1.327 (2) and 1.431 (2) Å]. In the crystal, N—H⋯O hydrogen bonds link the mol­ecules into chains parallel to [010]

1-Benzoyl-3-ethyl-3-phenyl­thio­urea

In the title compound, C16H16N2OS, the conformation at the two partially double C—N bonds of the thio­urea unit is E. The amide group is twisted relative to the thio­urea fragment, forming a dihedral angle of 62.44 (16)°, and the two phenyl rings form a dihedral angle 75.93 (18)°. In the crystal, mol­ecules are linked by N—H⋯S hydrogen bonds, forming centrosymmetric dimers

N-(Pyrrolidin-1-ylcarbothio­yl)benzamide

In the title compound, C12H14N2OS, the pyrrolidine ring adopts an envelope conformation with the C atom at the 3-position as the flap and makes a dihedral angle of 65.80 (9)° with the benzene ring. In the crystal, N—H⋯O hydrogen bonds join c-glide related mol­ecules into chains extended along [001] that are further connected into (100) layers via C—H⋯O inter­actions

4-tert-Butyl-3′,4′-bis­(4-methyl­phen­yl)-3,4-dihydro-1H,4′H-spiro­[naphthalene-2,5′-[1,2]oxazol]-1-one

In the title compound, C30H31NO2, the cyclo­hexa­none ring in the naphthalene fused-ring system adopts a half-chair conformation, presumably due to conjugation of the benzene ring. The naphthalene ring system makes dihedral angles of 86.63 (7), 65.15 (8) and 63.18 (8)° with respect to the two methyl­benzene planes and the 1,2-oxazole ring system. Inter­molecular C—H⋯O and C—H⋯N hydrogen bonding and C—H⋯π inter­actions stabilize the crystal structure. The H atoms of the two methyl groups of the methyl­phenyl groups are disordered over two positions with equal occupancies

1-Ethyl-1-methyl-3-(2-nitro­benzo­yl)thio­urea

In the title compound, C11H13N3O3S, the benzene ring is twisted relative to the amidic fragment, forming a dihedral angle of 27.26 (9)°. The thiono and carbonyl groups are trans with respect to the C—N bond. Inter­molecular N—H⋯S and C—H⋯O hydrogen bonds link the mol­ecules in the crystal structure

3-Ethyl-6-{1-[4-(2-methyl­prop­yl)phen­yl]eth­yl}-1,2,4-triazolo[3,4-b][1,3,4]thia­diazole

In the mol­ecule of the title compound, C17H22N4S, the triazolothia­diazole ring system is essentially planar and forms a dihedral angle of 74.34 (6)° with the benzene ring. In the crystal structure, mol­ecules are linked into chains running along the b axis by C—H⋯π inter­actions; adjacent chains are cross-linked via C—H⋯N hydrogen bonds and short S⋯N contacts [3.2694 (14) and 3.2953 (14) Å]

2-Amino-N-(2-benz­yloxy-3-methoxy­benzyl­idene)aniline

The title compound, C21H20N2O2, a Schiff base ligand, contains two independent mol­ecules (A and B) in the asymmetric unit, with similar conformations. In mol­ecule A, the central benzene ring forms dihedral angles of 30.79 (13) and 23.56 (13)°, respectively, with the amino and benzyl benzene rings, while in mol­ecule B these angles are 32.30 (13) and 13.13 (12)°. The mol­ecular structure is stabilized by intra­molecular N—H⋯N and C—H⋯O hydrogen bonds. The crystal structure is stabilized by N—H⋯N hydrogen bonds and N—H⋯π and C—H⋯π inter­actions

(2E)-4-tert-Butyl-2-(4-meth­oxy­benzyl­idene)-3,4-dihydro­naphthalen-1(2H)-one

In the title compound C22H24O2, the exocyclic C=C double bond is in an E configuration and the tert-butyl group is in an axial position on the cyclo­hexa­none ring. The cyclo­hexa­none ring in the dihydro­naphthalene fused-ring system adopts a half-chair conformation in both independent two mol­ecules in the asymetric unit. The benzene ring system is oriented angles of 43.97 (12) and 39.24 (12)° with respect to the naphthyl ring system in the two independent mol­ecules. In the crystal, mol­ecules are linked via C—H⋯O hydrogen bonds and C—H⋯π inter­actions

2-[1-(2-Hydroxy-3-methoxybenzyl)-1H-benzimidazol-2-yl]-6-methoxyphenol monohydrate

The asymmetric unit of the title compound, C22H20N2O4·H2O, comprises a substituted benzimidazole molecule and a water mol­ecule of crystallization. The dihedral angles between the benzimidazole ring system and the two outer benzene rings are 16.54 (4) and 86.13 (4)°. The dihedral angle between the two hydr­oxy-substituted benzene rings is 82.20 (5)°. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds, involving the hydr­oxy groups and water mol­ecules, form R 4 4(8) ring motifs, and link symmetry-related mol­ecules into extended chains along the c axis. The crystal structure is further stabilized by weak inter­molecular C—H⋯O hydrogen bonds, weak C—H⋯π and π–π stacking [centroid–centroid = 3.6495 (6)–3.7130 (6) Å] inter­actions. Intra­molecular O—H⋯O and O—H⋯N inter­actions are also present