(2E)-1-(5-Bromo­thio­phen-2-yl)-3-(2,3,4-trimeth­oxy­phen­yl)prop-2-en-1-one

In the title compound, C₁₆H₁₅BrO₄S, the thio­phene ring is not coplanar with the benzene ring; the dihedral angle between the two planes is 11.08 (12)°. The crystal structure is characterized by C—H...O inter­actions. Weak intra­molecular C—H...O hydrogen bonds also occur.

(6-Meth­oxy-2-oxo-2H-chromen-4-yl)methyl pyrrolidine-1-carbodithio­ate

In the title compound, C₁₆H₁₇NO₃S₂, the 2H-chromene ring is close to being planar [maximum deviation = 0.034 (2) Å] and the pyrrolidine ring is twisted about the C—C bond opposite the N atom. The dihedral angle between the ring-system planes is 75.24 (16)° and an intra­molecular C—H...S inter­action occurs. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds and the packing also exhibits π–π inter­actions, with a distance of 3.6106 (13) Å between the centroids of the benzene rings of neighbouring mol­ecules.

(5,7-Dimethyl-2-oxo-2H-chromen-4-yl)methyl pyrrolidine-1-carbodithio­ate

In the title compound, C₁₇H₁₉NO₂S₂, the 2H-chromene ring system is almost planar, with a maximum deviation of 0.044 (2) Å, and the pyrrolidine ring adopts an envelope conformation. The dihedral angle between the 2H-chromene system and the planar part of the pyrrolidine ring is 83.65 (8)°. A weak intra­molecular C—H...S hydrogen bond occurs. The crystal structure features C—H...O hydrogen bonds and π–π inter­actions, with a centroid–centroid distance of 3.5728 (16) Å.