4-[4-(4-Chloro-1,2,5-thia-diazol-3-yl)phen-yl]morpholine.

The title compound, C12H12ClN3OS, was prepared using a Suzuki-Miyaura cross-coupling reaction. The compound was found to crystallize in the ortho-rhom-bic system (space group Pbca, Z = 8). The crystal structure was refined with non-spherical atomic form factors using Hirshfeld atom refinement. The mean planes through the thia-diazole ring and the benzene ring are inclined at an angle of 36.83 (2)°. The morpholine ring adopts a chair conformation with a markedly pyramidal bonding situation at the N atom. The crystal packing is dense, with a packing index of 75%.