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1.  4-(4,5-Diphenyl-1H-imidazol-2-yl)-N,N-di­methyl­aniline 
The asymmetric unit of the title compound, C23H21N3, consists of two symmetry-independent and conformationally different mol­ecules [the comparable dihedral angles between the imidazole ring and the three benzene rings being 38.5 (2)/61.5 (3)/3.37 (17) and 45.8 (2)/36.01 (19)/46.94 (17)°]. In the crystal, inter­molecular imidazole N—H⋯N hydrogen-bonding inter­actions give a one-dimensional chain extending along [101].
doi:10.1107/S160053681301444X
PMCID: PMC3772450  PMID: 24046593
2.  (Z)-N-[2-(N′-Hy­droxy­carbamimido­yl)phen­yl]acetamide 
The asymmetric unit of the title compound, C9H11N3O2, contains two mol­ecules (A and B), which exist in Z conformations with respect to their C=N double bond. The dihedral angles between the benzene ring and the pendant hy­droxy­carbamimidoyl and acetamide groups are 28.58 (7) and 1.30 (5)°, respectively, in mol­ecule A and 25.04 (7) and 27.85 (9)°, respectively, in mol­ecule B. An intra­molecular N—H⋯N hydrogen bond generates an S(6) ring in both mol­ecules. Mol­ecule A also features an intra­molecular C—H⋯O inter­action, which closes an S(6) ring. In the crystal, the mol­ecules are linked by N—H⋯O, N—H⋯N, O—H⋯O, O—H⋯N, C—H⋯O and C—H⋯N hydrogen bonds and C—H⋯π inter­actions, generating a three-dimensional network.
doi:10.1107/S1600536813003371
PMCID: PMC3588555  PMID: 23476559
3.  2-(4-Meth­oxy­phenyl)-2-oxoethan­aminium chloride 
In the cation of the title compound, C9H12NO2 +·Cl−, the dihedral angle between the 2-oxoethanaminium N—C—C(=O)– plane [maximum deviation = 0.0148 (12) Å] and the benzene ring is 7.98 (8)°. The meth­oxy group is approximately in-plane with the benzene ring, with a C—O—C—C torsion angle of −2.91 (18)°. In the crystal, the cations and chloride anions are connected by N—H⋯Cl and C—H⋯Cl hydrogen bonds, forming a layer parallel to the bc plane. A C—H⋯π inter­action further links the layers.
doi:10.1107/S1600536812039645
PMCID: PMC3470349  PMID: 23125762

Results 1-3 (3)