2-(4-Chloro-phen-yl)-4,5-diphenyl-1-(prop-2-en-1-yl)-1H-imidazole.

The title compound, C24H19ClN2, crystallizes with two independent mol-ecules in the asymmetric unit. The prop-2-enyl substituents on the imidazole rings adopt similar conformations in the two mol-ecules. The 4-and 5-substituted phenyl rings and the benzene ring make dihedral angles of 67.06 (8), 5.61 (8) and 41.09 (8)°, respectively, with the imadazole ring in one mol-ecule and 71.53 (8), 28.85 (8) and 41.87 (8)°, respectively, in the other. The crystal structure features C-H⋯π inter-actions and weak π-π stacking inter-actions [centroid-centroid distances = 3.6937 (10) and 4.0232 (10) Å] between the chloro-phenyl rings, which form a three-dimensional supramolecular structure.

2,4,5-Triphenyl-1-(prop-2-en-1-yl)-1H-imidazole.

In the title compound, C24H20N2, one of the ring C atoms and one of the ring N atoms are disordered over two sets of sites in a 0.615 (3):0.385 (3) ratio. The two parts of the disordered imidazole ring adopt an envelope conformation, with the undisordered ring N atom as the flap, displaced by -0.118 (6) and 0.226 (7) Å, respectively, in the two disorder components from the plane through the other ring atoms. The crystal structure features C-H⋯N hydrogen bonds and C-H⋯π inter-actions, which lead to the formation of infinite chains along [010].

14-Bromo-12-chloro-2,16-dioxa-penta-cyclo-[7.7.5.0(1,21).0(3,8).0(10,15)]henicosa-3(8),10,12,14-tetra-ene-7,20-dione.

In the title compound, C19H16BrClO4, both the fused xanthene rings and one of the cyclo-hexane rings adopt envelope conformations, while the other cyclo-hexane ring is in a chair conformation. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming infinite chains running along [10-1] incorporating R 2 (2)(16) ring motifs. In addition, C-H⋯π inter-actions and weak π-π stacking inter-actions [centroid-centroid distance = 3.768 (3) Å] help to consolidate the packing.

4-(1-Allyl-4,5-diphenyl-1H-imidazol-2-yl)-N,N-dimethyl-aniline.

The title compound, C26H25N3, crystallizes with four independent mol-ecules, 1-4, in the asymmetric unit of the triclinic unit cell. The allyl substituents on the imidazole rings adopt similar conformations in all four mol-ecules. The imadazole and the 4-and 5-substituted phenyl rings of two pairs of molecules in the asymmetric unit stack parallel to (110). In contrast, the dimethyl-aniline systems in these pairs of mol-ecules are almost normal to one another, with dihedral angles of 85.84 (10) and 85.65 (10)° between the benzene rings of the two dimethyl-aniline fragments of mol-ecules 1 and 2, and 3 and 4, respectively. The crystal structure features an extensive series of C-H⋯π inter-actions that link the mol-ecules into undulating rows along the c axis. The crystal studied was a pseudo-merohedral twin with twin law [-100, 0-10, 111] and the BASF parameter refined to 0.513 (3).

2-(3,4-Dimeth-oxy-phen-yl)-4,5-diphenyl-1-(prop-2-en-1-yl)-1H-imidazole.

In the title compound, C(26)H(24)N(2)O(2), the planar 1H-imidazole ring makes dihedral angles of 35.78 (4), 26.35 (5) and 69.75 (5)°, respectively, with the dimeth-oxy-phenyl ring and the phenyl rings in the 4- and 5-positions. In the crystal, C-H⋯O hydrogen bonds connect neighbouring mol-ecules, forming infinite chains running along the b axis. Furthermore, the crystal structure exhibits a C-H-⋯π inter-action between a methyl H atom and a phenyl ring from an adjacent mol-ecule.