(Z)-N-[1-(Aziridin-1-yl)-2,2,2-tri­fluoro­ethyl­idene]-4-bromo­aniline

The title compound, C₁₀H₈BrF₃N₂, crystallizes with two independent mol­ecules in the asymmetric unit, which can be considered as being related by a pseudo-inversion center, so their conformations are different; the corresponding N=C—N—C torsion angles are 54.6 (5) and −50.5 (5)°. In the crystal, mol­ecules related by translation in [001] inter­act through short inter­molecular Br...F contacts [3.276 (2) and 3.284 (2) Å], thus forming two types of crystallographically independent chains.

3-Bromo-2-[4-(methyl­sulfan­yl)phen­yl]-5,6,7,8-tetra­hydro-1,3-benzo­thia­zolo[3,2-a]imidazole

In the title mol­ecule, C₁₆H₁₅BrN₂S₂, the central imidazo[2,1-b]thia­zole fragment is almost planar (r.m.s. deviation = 0.012 Å), and the fused 5,6,7,8-tetra­hydro­benzene ring adopts an unsymmetrical half-chair conformation. The dihedral angle between the imidazo[2,1-b]thia­zole and benzene planes is 18.25 (4)°. The terminal methyl­sulfanyl substituent lies practically within the benzene plane [the dihedral angle between the corresponding planes is 7.20 (10)°] and is turned toward the C—Br bond. In the crystal, mol­ecules form infinite chains along [100] via secondary Br...N inter­actions [3.1861 (16) Å]. The chains are arranged at van der Waals distances.