1-(6-Chloro-1-methyl-1H-imidazo[4,5-c]pyridin-4-yl)-3-(2-chloro­phen­yl)urea

In the title compound, C₁₄H₁₁Cl₂N₅O, the plane of the 1H-imidazo[4,5-c]pyridine ring system [r.m.s. deviation = 0.087 (19) Å] makes a dihedral angle of 4.87 (10)° with the terminal phenyl ring. An intra­molecular N—H...N hydrogen bond stabilizes the mol­ecular conformation. In the crystal, N—H...O hydrogen bonds link the mol­ecules into inversion dimers. These dimers are connected by π–π inter­actions between imidazole rings [shortest centroid–centroid distance = 3.4443 (14) Å].

Crystal structure of 1-ethyl­spiro­[imid­az­olidine-4,1′-indane]-2,5-dione

In the title compound, C₁₃H₁₄N₂O₂, the C₅ ring has an envelope conformation with the C atom adjacent to the quaternary C being the flap. The five atoms comprising the imidazolidine-2,4-dione ring are almost planar (r.m.s. deviation = 0.004 Å). The dihedral angle between the five-membered rings is 89.66 (10)°. In the crystal, inversion-related mol­ecules are connected via {...HNCO}₂ synthons. These are linked into a helical supra­molecular chain along [010] by C—H...O inter­actions.

Crystal structure of 1′-(2-methyl­prop­yl)-2,3-di­hydro­spiro­[1-benzo­thio­pyran-4,4′-imidazolidine]-2′,5′-dione

In the title compound, C₁₅H₁₈N₂O₂S, the 2,3-di­hydro-1-benzo­thio­pyran ring adopts a sofa conformation and the hydantoin ring is twisted with respect to the benzene ring at 78.73 (17)°. In the crystal, pairs of N—H...O hydrogen bonds link the mol­ecules into inversion dimers.