The dimeric mol­ecule of the hydro­thermally synthesized binuclear complex [Cu₂(C₂H₆NO₃S)₂(ClO₄)₂(C₁₀H₈N₂)₂], a tauride complex, occupies a special position on an inversion centre. The Cu atom has a severely distorted octahedral coordination, with four short and two substantially longer bonds. The four short bonds involve two bi­pyridine and one taurine N atoms [Cu—N_bipyridine = 1.990 (3) and 2.025 (3) Å, Cu—N_taurine = 1.992 (3) Å] as well as one of the taurine O atoms [Cu—O = 1.964 (3) Å]. The second taurine O atom belonging to the second bridging mol­ecule forms a much longer Cu—O bond [2.363 (4) Å], and the perchlorate O atom participates in the longest Cu—O bond [2.675 (3) Å]. The mol­ecules are linked via N—HO bonds into infinite chains running along the a axis of the crystal structure.

In the crystal structure of the title compound, C₂₃H₁₉NO₂, the mol­ecular backbone is nearly planar, with a dihedral angle of 11.58 (12)° between the planes of the carbazole and benzene groups.

The title compound, C₃₂H₂₇N, was synthesized via the Ullmann reaction. The structure has a pseudo-twofold axis approximately parallel to the b axis, and hence the pseudo-space group C2/c. The crystal packing is stabilized by weak C—Hπ and and van der Waals interactions.

The title compound, C₃₂H₂₃Cl₂N, was synthesized via the Ullmann reaction. The orientations of the three aromatic rings attached to the vinyl group are determined by the sp² state of the vinyl C atoms. The crystal packing is stabilized by weak C—Hπ interactions.

The title compound, C₃₀H₂₃N, was synthesized via the Ullmann reaction. The plane of the vinyl linkage almost coincides with the plane of the directly attached aromatic ring of the triarylamine group [dihedral angle 6.2 (2)°] and forms a dihedral angle of 41.07 (4)° with the mean plane of the naphthalene group.

The title compound, C₂₁H₃₀O, was isolated from the soft coral Sinularia sp. The mol­ecule contains four alicyclic rings, all trans-fused, among which three six-membered rings are in different distorted chair conformations while a five-membered ring assumes an envelope form.

The structure of a new diterpene, C₃₀H₄₆O₁₁, with anti­bacterial activity against Pseudomonas aeruginose and Escherichia coli, isolated from the fresh whole plants of Ajuga lupulina (Labiatae) was established to be 2β-hydroxy-2-methylbutanoyl-3α-lupulin (3-deoxy-14,15-dihydro-2-hydroxy-15-methoxycaryoptinol 2-methylbutanoate), by means of X-ray crystallographic analysis. The present study confirms that the two six-membered rings are in ideal chair conformations.

In the title compound, 3-deoxy-14,15-dihydro-15-methoxycaryoptinol, C₂₅H₃₈O₈, the conformation of the 15-methoxy group has been determined by X-ray analysis. The structure is stabilized by van der Waals interactions.

In the title compound, [Zn(C₇H₃Br₂O₂)₂(H₂O)₂], the Zn^II atom is six-coordinated in a slightly distorted octa­hedral coordination geometry by four O atoms of two 3,5-dibromo-2-hydroxy­benzaldehyde ligands and by two water mol­ecules. The Zn—O bond lengths lie in the range 2.040 (4)–2.121 (4) Å, and the angles subtended at the Zn^II atom range from 84.10 (18) to 96.64 (17)°. The mol­ecules are linked into a chain along the a axis by O—HO and O—HBr hydrogen bonds.

The complete mol­ecule of the title compound, C₂₈H₂₈B₂Br₄O₄, is generated by the application of a centre of inversion. In the mol­ecule, the BO₂ plane is perpendicular to that through the pyrene ring [dihedral angle = 86.27 (13)°]. In the crystal, mol­ecules stack into columns along the b axis, the closest contact between these being of the type C—Brπ.

In the title compound, C₁₄H₁₆N₄, the imidazole ring is coplanar with the quinoline system. In the solid state, the mol­ecules are linked by N—HN hydrogen bonds which propagate in a chain parallel to the a axis.