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1.  3-Methyl-4-{(E)-[4-(methyl­sulfan­yl)benzyl­idene]amino}-1H-1,2,4-triazole-5(4H)-thione 
In the title mol­ecule, C11H12N4S2, the dihedral angle between the triazole and benzene rings is 21.31 (5)°. A weak intra­molecular C—H⋯S hydrogen bond generates an S(6) ring motif. In the crystal, pairs of N—H⋯S hydrogen bonds form inversion dimers. In addition, π–π inter­actions are observed between the benzene rings, with a centroid–centroid separation of 3.7599 (11) Å.
doi:10.1107/S1600536813009690
PMCID: PMC3648251  PMID: 23723871
2.  4-Amino-3-(3-meth­oxy­benz­yl)-1H-1,2,4-triazole-5(4H)-thione 
In the title mol­ecule, C10H12N4SO, the triazole ring forms a dihedral angle of 73.0 (5)° with the benzene ring. The meth­oxy group is approximtely coplanar with the benzene ring with a C C—O—Cmeth­yl torsion angle of 4.7 (3)°. In the crystal, N—H⋯S hydrogen bonds connect pairs of inversion-related mol­ecules, which are in turn connected by N—H⋯N hydrogen bonds into chains of rings along [010]. Weak C—H⋯O hydrogen bonds connect these chains into a two-dimensional network parallel to (-102).
doi:10.1107/S1600536813009859
PMCID: PMC3648260  PMID: 23723880
3.  1-[4-(Prop-2-en-1-yl­oxy)benz­yl]-2-[4-(prop-2-en-1-yl­oxy)phen­yl]-1H-benzimidazole 
In the title compound, C26H24N2O2, the benzimidazole ring system is almost planar [maximum displacement = 0.025 (1) Å] and makes dihedral angles of 80.48 (5) and 41.57 (5)° with the benzene rings, which are inclined to one another by 65.33 (6)°. In the crystal, mol­ecules are linked via C—H⋯π and weak π–π inter­actions [centroid–centroid distance = 3.8070 (7) Å and inter­planar distance = 3.6160 (5) Å].
doi:10.1107/S160053681204559X
PMCID: PMC3588921  PMID: 23476157
4.  4-{(E)-2-[4-(But-3-en-1-yl­oxy)phen­yl]diazen-1-yl}benzoic acid 
The title compound, C17H16N2O3, has an E conformation about the azobenzene (–N=N–) linkage. The benzene rings are twisted slightly with respect to each other [6.79 (9)°], while the dihedral angle between the plane through the carb­oxy group and the attached benzene ring is 3.2 (2)°. In the crystal, mol­ecules are oriented with the carb­oxy groups head-to-head, forming O—H⋯O hydrogen-bonded inversion dimers. These dimers are connected by C—H⋯O hydrogen-bonds into layers lying parallel to the (013) plane.
doi:10.1107/S1600536812038718
PMCID: PMC3470328  PMID: 23125741
5.  2-(8-Bromo­imidazo[1,2-a]pyridin-2-yl)-N′-[(E)-4-diethyl­amino-2-hy­droxy­benzyl­idene]acetohydrazide dihydrate 
In the title compound, C20H22BrN5O2·2H2O, the Schiff base mol­ecule exists in an E conformation with respect to the acyclic C=N bond. An S(6) ring motif is formed via an intra­molecular O—H⋯N hydrogen bond. The dihedral angle between the imidazo[1,2-a]pyridine system and the benzene ring is 84.62 (5)°. In the crystal, N—H⋯O, O—H⋯O, O—H⋯N, C—H⋯O and C—H⋯Br hydrogen bonds link the mol­ecules into a three-dimensional network. The crystal packing is further stabilized by C—H⋯π and π–π inter­actions [centroid–centroid distance = 3.5365 (7) Å].
doi:10.1107/S160053681200685X
PMCID: PMC3297878  PMID: 22412681
6.  Ethyl 1-(2,4-dichloro­benz­yl)-4-oxo-7-trifluoro­meth­yl-1,4-dihydro­quinoline-3-carboxyl­ate 
In the title compound, C20H14Cl2F3NO3, the trifluromethyl group is disordered over two sets of sites in a 0.784 (10):0.216 (10) ratio. The quinoline ring system is essentially planar with a maximum deviation of 0.058 (2) Å for the N atom and forms dihedral angles of 89.23 (11) and 8.13 (17)°, respectively with the mean planes of the benzene ring and the carboxyl­ate group. In the crystal, pairs of weak C—H⋯O and C—H⋯F hydrogen bonds link mol­ecules into centrosymmetric dimers. The crystal structure is further stabilized by weak π–π [centroid–centroid distance = 3.624 (2) Å] inter­actions.
doi:10.1107/S1600536812001249
PMCID: PMC3275192  PMID: 22347048

Results 1-6 (6)