5-(Adamantan-1-yl)-N-methyl-1,3,4-thia­diazol-2-amine

In the title compound, C₁₃H₁₉N₃S, the methyl­amine substituent is coplanar with the thia­diazole ring to which it is attached [C—N—C—S torsion angle = 175.9 (2)°] and the amine H atom is syn to the thia­diazole S atom. Supra­molecular chains along [101], sustained by N—H...N hydrogen bonding, feature in the crystal packing.

5-(Adamantan-1-yl)-3-[(4-fluoro­anilino)meth­yl]-2,3-di­hydro-1,3,4-oxa­diazole-2-thione

In the title compound, C₁₉H₂₂FN₃OS, the dihedral angle between the inclined oxa­diazole and benzene rings is 52.7 (3)°. In the crystal, helical supra­molecular chains along [100] are sustained by N—H...S hydrogen bonds supported by methyl­ene–benzene C—H...π inter­actions. The crystal studied was an inversion twin with the fractional contribution of the minor component being 0.33 (14).