(E)-2-[(Furan-2-yl)methyl­idene]-7-methyl-2,3,4,9-tetra­hydro-1H-carbazol-1-one

In the title mol­ecule, C₁₈H₁₅NO₂, the atoms in the carbazole unit deviate from planarity [maximum deviation from mean plane = 0.1317 (12) Å]. The pyrrole ring makes dihedral angles of 1.01 (8) and 18.56 (10)° with the benzene and furan rings, respectively. The cyclo­hexene ring adopts a half-chair conformation. In the crystal, pairs of N—H...O hydrogen bonds form an R₂²(10) ring. Mol­ecules are further linked by C—H...O and C—H...π inter­actions, forming a three-dimensional network.

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.

[meso-5,10,15,20-Tetra­kis(3-methyl­thio­phen-2-yl)porphyrinato-κ⁴N,N′,N′′,N′′′]nickel(II) benzene hemisolvate

In the title compound, [Ni(C₄₀H₂₈N₄S₄)]·0.5C₆H₆, the Ni^II atom is in a square-planar geometry defined by four pyrrole N atoms. There is considerable buckling in the porphyrin ring with the dihedral angles between the N₄ donor set and the pyrrole rings being in the range 16.24 (5)–22.47 (5)°. Each of the six-membered chelate rings is twisted about an Ni—N bond and the dihedral angles between diagonally opposite chelate rings are 21.36 (4) and 23.87 (4)°; each pair of rings is oriented in opposite directions. The methyl­thienyl rings are twisted out of the plane of the central N₄ core with dihedral angles in the range 75.98 (2)–88.70 (5)°. All four methyl­thienyl groups are disordered over two sets of sites, as is commonly found with such groups, with occupancies of 0.553 (8):0.447 (8), 0.579 (7):0.421 (7), 0.796 (6):0.204 (6) and 0.956 (7):0.044 (7). The benzene solvent mol­ecule was found to be present in half-occupancy.

7-Methyl-1-phenyl-1,10-di­hydro­pyrazolo­[3,4-a]carbazole

In the title mol­ecule, C₂₀H₁₅N₃, the atoms in the carbazole unit deviate from planarity [maximum deviation from mean plane = 0.1082 (15) Å]. The pyrrole ring makes dihedral angles of 3.17 (8)/4.10 (9), 7.20 (9) and 44.62 (9)° with the fused benzene, pyrazole and phenyl rings, respectively. In the crystal, mol­ecules are linked via N—H...N hydrogen bonds, forming an infinite chain along [010]. Mol­ecules are further linked by nine π–π [centroid–centroid distances vary from 3.6864 (11) to 3.9802 (11) Å] and one C—H...π inter­action, forming a three-dimensional network.