catena-Poly[[[O,O′-bis­(2-methyl­phen­yl) dithio­phosphato-κ²S,S]lead(II)]-μ-O,O′-bis­(2-methyl­phen­yl) dithio­phosphato-κ³S,S′:S]

In the title compound, [Pb(C₁₄H₁₄O₂PS₂)₂]_n, the metal atom is surrounded by two O,O′-bis­(2-methyl­phen­yl) dithio­phosphate ligands bonding through the S-donor atoms. Three of the Pb—S bond lengths are are close to each other at 2.7710 (18), 2.8104 (16) and 2.8205 (16) Å, while the fourth Pb—S bond is elongated at 3.0910 (18) Å and reflects the fact that this atom is involved in inter­molecular bridging to an adjacent Pb^II atom [Pb—S = 3.145 (2) Å]. The bond angles demonstrate that the Pb^II atom contains a stereochemically active lone pair with a distorted octa­hedral geometry about the Pb^II atom. This distortion is shown by the S—Pb—S bite angles of 73.63 (4) and 69.50 (4)°, while the remaining S—Pb—S angles range from 81.03 (5) to 143.66 (5)°. One of the benzene rings shows positional disorder over two orientations with occupancy factors of 0.747 (11) and 0.253 (11).

Ethyl 2,7,7-trimethyl-4-(1-methyl-1H-indol-3-yl)-5-oxo-1,4,5,6,7,8-hexa­hydro­quinoline-3-carboxyl­ate

In the title mol­ecule, C₂₄H₂₈N₂O₃, the cyclo­hexene ring is in a sofa conformation and the 1,4-dihydro­pyridine ring is in a slight boat conformation. In the indole ring system, the pyrrole and benzene rings form a dihedral angle of 2.63 (7)°. In the crystal, N—H...O hydrogen bonds connect the mol­ecules into C(6) chains parallel to the b axis and pairs of weak C—H...O hydrogen bonds link inversion-related chains into a ladder motif through R₂²(18) rings. A weak intra­molecular C—H...O hydrogen bond is also observed.

2-(1-Phenyl-1H-benzimidazol-2-yl)phenol

In the title mol­ecule, C₁₉H₁₄N₂O, the benzimidazole unit is close to being planar [maximum deviation = 0.0253 (11) Å] and forms dihedral angles of 68.98 (6) and 20.38 (7)° with the adjacent phenyl and benzene rings; the dihedral angle between the latter two planes is 64.30 (7)°. An intra­molecular O—H...N hydrogen bond generates an S(6) ring motif. In the crystal, mol­ecules are linked by C—H...N and C—H...O hydrogen bonds, and consolidated into a three-dimensional architecture by π–π stacking inter­actions, with a centroid–centroid distance of 3.8428 (12) Å.

2,2,7,7-Tetra­methyl-1,2,3,4,5,6,7,8-octa­hydro­acridine-1,8-dione

The whole molecule of the title compound, C₁₇H₂₁NO₂, is generated by twofold rotational symmetry. The N atom and the C and H atoms in position 4 of the pyridine ring lie on the twofold axis. The cyclohexene ring has a sofa conformation with the CH₂ C atom adjacent to the dimethyl-substituted C atom displaced by 0.5949 (16) Å from the mean plane of the other five C atoms. In the crystal, weak C—H...O inter­actions link the mol­ecules into chains parallel to the a axis. In addition, π–π stacking inter­actions [centroid–centroid distance = 3.8444 (7) Å] contribute to the stabilization of the crystal structure.