Chlorido[1-phenyl-3-(2,3,5,6-tetra-methyl-benz-yl)benzimidazol-2-yl-idene]silver(I).

In the title compound, [AgCl(C(24)H(24)N(2))], the terminal phenyl and tetra-methyl-benzene rings [which form a dihedral angle of 87.92 (14)°] make dihedral angles of 59.59 (11) and 83.19 (12)° with respect to the central benzimidazole ring system. The Ag-C and Ag-Cl single-bond lengths are 2.087 (3) and 2.3267 (9) Å. The C-Ag-Cl bond angle is 172.84 (7)°. C-H⋯π inter-actions contribute to the stabilization of the crystal structure. A very weak π-π stacking inter-action between adjacent tetra-methyl-benzene rings [centroid-centroid distance = 4.0610 (18) Å] is also observed.

Butyl 4-(4-methyl-benzene-sulfonamido)-benzoate.

In the title compound, C(18)H(21)NO(4)S, the aromatic rings are almost normal to each other, with a dihedral angle of 89.27 (18)°. The mol-ecular conformation is stabilized by an intra-molecular C-H⋯O inter-action, which generates an S(6) motif. In the crystal, N-H⋯O and C-H⋯O hydrogen bonds lead to the formation of chains propagating along [010]. Neighbouring chains are linked via a C-H⋯π inter-action. The -CH(2)CH(2)CH(3) atoms of the butyl group are disordered over two sets of sites, with a refined site-occupancy ratio of 0.536 (16):0.464 (16).

4'-tert-Butyl-5-chloro-3H-spiro-[1,3-benzothia-zole-2,1'-cyclo-hexa-ne].

In the title compound, C(16)H(22)ClNS, the nine-membered 2,3-dihydro-1,3-benzothia-zole ring system is essentially planar, with a maximum deviation of 0.025 (2) Šfor the N atom. Its plane is almost perpendicular to the main plane of the substituted cyclo-hexane ring, which adopts a chair conformation. In the crystal, the molecules are linked by C-H⋯π inter-actions.

1-(4-Meth-oxy-phen-yl)-4-(4-methyl-phen-yl)-3-phen-oxy-azetidin-2-one.

The central ß-lactam ring of the title compound, C(23)H(21)NO(3), is almost planar (r.m.s. deviation = 0.032Å). The meth-oxy-benzene ring is almost coplanar with the ß-lactam ring [dihedral angle = 1.87 (11)°], whereas the tolyl ring is almost normal to it [75.73 (12)°]. The dihedral angle between the ß-lactam ring and the O-bonded phenyl ring is 51.95 (12)°. An intra-molecular C-H⋯O inter-action generates an S(6) ring. The crystal structure features inter-molecular C-H⋯O hydrogen bonds, forming layers parallel to (011), and weak C-H⋯π inter-actions. Two aromatic π-π stacking inter-actions [centroid-centroid distances = 3.6744 (12) and 3.6799 (11) Å] are also observed.