5-Meth-oxy-1-(3,4,5-trimethoxy-phen-yl)-1H-indole.

The title compound, C(18)H(19)NO(4), was prepared as an indole derivative with possible anti-mitotic properties. The planes of the indole and trimethoxy-phenyl rings make a dihedral angle of 45.35 (5)° with one another. In the crystal, mol-ecules related by a twofold screw axis exhibit arene C-H⋯arene-π inter-actions which are 3.035 (1) Šin length.

Methyl 5,6-dimeth-oxy-1H-indole-2-carboxyl-ate.

The title compound, C(12)H(13)NO(4), was prepared as a precursor to an indole derivative with possible anti-mitotic properties. The mol-ecule is very nearly planar; the maximum deviation of any non-H atom from the mean plane of the indole ring is 0.120 (3) Šfor each of two meth-oxy C atoms. The pairs of mol-ecules related by the inversion centre at (0,0,) are connected by two symmetry-equivalent N-H⋯O hydrogen bonds, while the pairs of mol-ecules related by the inversion centre at (0,0,0) exhibit a π-stacking inter-action of the indole rings, with an inter-planar separation of 3.39 (3) Å.

Bis-(benzene-thiol-ato)(2,2'-biquinoline)zinc(II).

The title compound, [Zn(C(6)H(5)S)(2)(C(18)H(12)N(2))], was prepared as a model for future complexes that will be incorporated into light-harvesting arrays. The Zn(II) atom lies on a twofold rotation axis and the ligands are arranged tetra-hedrally around this atom. The benzene-thiol-ate ligand and the biquinoline ligand are nearly perpendicular to one another, making a dihedral angle of 84.09 (5)°. The biquinoline ligand is nearly planar, with a maximum deviation of 0.055 (3) Šfrom the mean plane of the ring system. In the crystal, the mol-ecules pack in a manner such that the biquinoline ligands are parallel to one another, with a π-π inter-action [interplanar distance = 3.38 (1) Å] with the neighboring biquinoline ligand.

Bis(2-naphthyl-meth-yl)diphenyl-silane.

The title compound, C(34)H(28)Si, was prepared as an inter-nal standard for diffusion-ordered NMR spectroscopy. The four ligands are arranged tetra-hedrally around the Si atom. The two naphthalene systems are nearly perpendicular, making an angle of 86.42 (4)° with one another. A naphthalene system and a phenyl ring are also nearly perpendicular, making an angle of 86.18 (6)° with one another. In the crystal, the mol-ecules pack in columns parallel to the a axis, and exhibit arene C-H⋯π(arene) inter-actions both within and between columns.