1-(2-Furo­yl)-3-(2-meth­oxy-4-nitro­phen­yl)thio­urea

The asymmetric unit of the title compound, C₁₃H₁₁N₃O₅S, contains two independent mol­ecules, which are linked by a pair of inter­molecular N—H...S hydrogen bonds, forming an R₂²(8) ring motif. The central thio­urea core forms dihedral angles of 3.02 (12) and 14.00 (10)° with the essentially planar furoyl groups [maximum deviations = 0.030 (2) and 0.057 (2) Å] in the two mol­ecules and dihedral angles of 2.43 (13) and 8.03 (12)° with the benzene rings. The dihedral angles between the furoyl and benzene rings in the two mol­ecules are 3.97 (10) and 5.98 (9)°. The trans–cis geometry of the thio­urea group is stabilized by three intra­molecular N—H...O hydrogen bonds involving carbonyl and meth­oxy O atoms with the H atom of the cis-thio­amide group and between furan O atom and the other thio­amide H atom. There is also a weak intra­molecular C—H...S inter­action in each mol­ecule.

3,3′-(1-Oxopropane-1,3-di­yl)bis­(1,3-thia­zolidine-2-thione) chloro­benzene hemisolvate

The title compound, C₉H₁₂N₂OS₄·0.5C₆H₅Cl, which contains two 1,3-thia­zolidine-2-thione rings, is a by-product of the synthesis of 3-acryloyl-1,3-thia­zolidine-2-thione. The dihedral angle between these rings is 79.95 (9)°, with both rings displaying a twisted conformation. The twist angle of the amide group is 5.6 (1)°. In the crystal, the molecules are linked into [001] chains by C—H...O interactions. The chloro­benzene solvent mol­ecule was found to show unresolvable disorder about a centre of inversion and its contribution to the scattering was removed with the SQUEEZE option in PLATON [Spek (2009). Acta Cryst. D65, 148–155].

2-(3,4-Dichloro­phen­yl)-N-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)acetamide

In the title compound, C₁₉H₁₇Cl₂N₃O₂, there are three mol­ecules (A, B and C) in the asymmetric unit and each differs in the conformation adopted. As a result of steric repulsion, the amide group is rotated with respect to both the dichloro­phenyl and 2,3-dihydro-1H-pyrazol-4-yl rings, making dihedral angles of 44.5 (2) and 56.2 (2)°, respectively in A, 51.1 (2) and 54.1 (2)° in B, and 53.8 (2) and 54.6 (2)° in C. The dihedral angles between the dichloro­phenyl and 2,3-dihydro-1H-pyrazol-4-yl rings are 54.8 (2), 76.2 (2) and 77.5 (2)° in mol­ecules A, B and C, respectively, while the 2,3-dihydro-1H-pyrazol-4-yl and phenyl rings make dihedral angles of 45.3 (2), 51.2 (2) and 42.8 (2)°, respectively. In the crystal, two of the mol­ecules are linked through N—H...O hydrogen bonding to an adjoining mol­ecule, forming dimers of the R₂²(10) type, while the third mol­ecule forms such dimers with itself. C—H...O inter­actions link the dimers.