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) Å for the N atom. Its plane is almost perpendicular to the main plane of the substituted cyclo-hexane ring, which adopts a chair conformation.

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.

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.

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

The central β-lactam ring of the title compound, C(23)H(21)NO(3), is almost planar (r.m.s.