Crystals of the title compound, 2C₂₆H₁₈N₄O₂·C₇H₈, were obtained from the reaction of 8-hydroxy­quinoline with 1,2-phenyl­enediamine in methanol and recrystallized from toluene. The compound contains three essentially planar ring systems: the benzimidazole ring (r.m.s. deviation = 0.039 Å) and two 8-hydroxy­quinoline rings (r.m.s. deviations of 0.0056 Å in both rings). The benzimidazole ring and one 8-hydroxy­quinoline ring are almost co-planar, forming a dihdral angle of 3.1 (2)°. The other 8-hydroxy­quinoline ring is almost perpendicular to the benzimidazole plane with a dihedral angle of 86.2 (2)°. Intra­molecular O—HN contacts are present. The crystal structure is stabilized by inter­molecular O—HN inter­actions. The complete toluene molecule is generated by crystallographic inversion symmetry; therefore its methyl group is disordered over two sites of equal occupancy.

In the title hydrated mol­ecular salt, 2C₃H₇N₆⁺·HPO₄²⁻·3H₂O, three of the O atoms of the hydrogen phosphate anion are disordered over two positions, with relative occupancies of 0.763 (1) and 0.237 (1). In the crystal, the components are linked by N—HN, N—HO and O—HO hydrogen bonds

In the title compound, C₈H₉N₂⁺·NO₃⁻, inter­molecular N—HO hydrogen bonds join the mol­ecules into a chain extending along the b axis.

In light of advances in detector technology, we revisit wide angle x-ray scattering techniques and their application to amorphous thin films that are of technological importance. For thin film materials the asymmetrical reflection geometry is employed to avoid the substrate signals. Incident x-ray angles are typically set close to the critical angles. There are various complications related to this geometry, in particular, raw scattering patterns being distorted. In addition, because these materials are typically weak scatterers due to disorder, increased data collection efficiency is always desired. Here, we report our activities using a 4-element vortex Si-drift detector for wide angle x-ray scattering experiments and present some experimental data collected on amorphous transparent conducting oxides.

Crystals of the title compound, C₁₀H₈N₂O₂, were obtained from a condensation reaction of hydrazine hydrate with furfural. In the crystal structure, the mol­ecule is centrosymmetric and almost planar and the furan rings are parallel by symmetry.

In the title compound, [Co(C₆H₅N₄)₃], the Co^III atom adopts a distorted octa­hedral CoN₆ coordination geometry, arising from three N,N′-bidentate deprotonated 2,2′-biimidazole ligands. The dihedral angles between the five-membered rings of the ligands are 4.1 (2), 9.4 (2) and 10.5 (2)°. In the crystal, mol­ecules are linked by N—HN hydrogen bonds, generating a layered network lying in (11).

In the title compound, [Mn(C₁₃H₉N₂O)₂(CH₃OH)₂]Cl, the Mn^III atom (site symmetry ) is coordinated by two N,O-bidentate 2-(1H-benzimidazol-2-yl)phenolate ligands and two methanol mol­ecules, to generate a distorted trans-MnN₂O₄ octa­hedral geometry for the metal ion. The dihedral angle between the aromatic ring systems in the ligand is 16.0 (3)°. In the crystal structure, the complex cations and chloride anions are linked by O—HCl and N—HCl hydrogen bonds. The chloride ion lies on a crystallographic twofold axis.

In the title salt, [Cu(NCS)(C₆H₆N₄)₂]Cl, the Cu^II atom adopts a five-coordinated square-pyramidal geometry consisting of an N atom from a thio­cyanate anion and four N atoms from two chealting biimidazole ligands. The thio­cyanate ligand occupies the axial position and is, like the Cu^II centre, located on a mirror plane. The cation and anion are linked into a linear chain by N—HS and N—HCl hydrogen bonds.

In the title complex, [Zn₂(C₁₀H₇NO₆)₂(C₅H₅N)₂]_n, the repeat unit is a centrosymmetic tetra-carboxyl­ato-O,O'-bridged dimer in which each Zn^II atom is five-coordinated by four O atoms from different dianionic 4,6-dimethyl-5-nitro­iso­phthalate ligands [Zn—O = 2.0283 (18)–2.0540 (19) Å] and one N atom from a pyridine mol­ecule [Zn—N = 2.030 (2) Å] in the axial site of a slightly distorted square-pyramidal coordination sphere. The ZnZn separation is 2.9750 (6) Å. The complex dimers are extended into a two-dimensional polymeric structure parallel to (100) through bridges provided by the second carboxyl­ate group of the ligand.