A one-dimensional lanthanum coordination polymer based on 3,6-di­chloro­phthalate has been prepared by microwaves-assisted synthesis and structurally described.

The lithium halide dimethyl ether (DME) adducts [Li2Cl2(DME)4] and [Li2Br2(DME)4] form dimeric units linked into layers by CH3⋯Cl tetrel bonds or CH3⋯CH3, CH3⋯O and CH3⋯Br contacts, illustrating the coordination ability of dimethyl ether and its role in directing supra­molecular assembly.

The two compounds Ag3ISO4 and Ag4I2SO4, comprising Ag and I atoms and SO4 tetra­hedra, exhibit characteristic silver arrangements, with Ag3ISO4 containing triangularly arranged Ag atoms in zigzag ladder chains along the a-axis direction and Ag4I2SO4 featuring discrete Ag4 clusters.

The phenyl ring forms a dihedral angle of 34.72 (6)° with the mean plane of the pyrazolo­[3,4-d]pyrimidine ring system.

The crystal structure of (C6H14N2)[Br3]2 contains diprotonated tri­ethyl­enediaminium cations, the charge of which is com­pensated by [Br3]− anions. The crystal packing is stabilized by Br⋯Br contacts, forming two-dimensional layers, and by N—H⋯Br/C—H⋯Br inter­actions between cations and tribromide anions.

In the title compounds, 2,2′-{[anthracene-9,10-diylbis(methyl­ene)]bis­(sulfanedi­yl)}di­benzoic acid di­methyl­acetamide tetra­solvate, C30H22O4S2·4C4H9NO 1 and 4,4′-{[anthracene-9,10-diylbis(methyl­ene)]bis­(­oxy)}di­benzoic acid di­methyl­formamide disolvate, C30H22O6·2C3H7NO 2, the complete anthracene–benzoic acid mol­ecule is generated by a crystallographic centre of symmetry. The dihedral angle between the anthracene ring system and the pendant ring is 71.43 (7) in 1 and 75.27 (12)° in 2. In the extended structures of both compounds, O—H⋯O hydrogen bonds link the main mol­ecules into pairs of solvent mol­ecules to generate trimers.

In the title solvates, the indole ring rotations (58–72°) relative to the plane of the central ring govern non-planarity. In the extended structures, N—H⋯O links form chains or sheets and disordered solvents were masked.

The title compound displays an infinite ladder structure built of alternately arranged ZnO3N and PO3(OH) tetra­hedra, linked O—H⋯O hydrogen bonds into supra­molecular sheets. C—H⋯O inter­actions between CH groups of the pyridine rings and phosphate groups connect the sheets into a three-dimensional framework structure.

The polymorphism of the title salen-type compound synthesized from racemic-(+/-)-1,2-di­phenyl­ethyl­enedi­amine and 3-chloro­salicyl­aldehyde is reported

A μ-oxo vanadium(V) dimeric complex, μ-oxido-bis­[(2,2′-{[ethane-1,2-diylbis(aza­nedi­yl)]bis­(methyl­ene)}diphenolato)oxidovanadium(V)], was synthesized and structurally characterized.

The title compound is a multi-substituted piperidine derivative in which the piperidine ring adopts a chair conformation.

The crystal structures of the two title hydrated phases of K3(VO4) consist of isolated vanadate tetra­hedra linked via K+ cations. The difference in water content is noticeable in the hydrogen-bonding inter­actions, which define a finite network for the 0.56-hydrate phase and an infinite network for the 4-hydrate phase.

The mol­ecule of the title compound, C16H9BrClNO2, contains furan and phenyl rings and an almost planar iso­indole ring system, which is coplanar with the furan ring. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into a two-dimensional network. π–π stacking helps to consolidate the packing.

The mol­ecule of the title compound contains a planar thieno[2,3-f]iso­indole ring system and a phenyl ring. In crystal, the mol­ecules are linked through C—H⋯O hydrogen bonds, enclosing R22(14) ring motifs, into a three-dimensional architecture. π–π inter­actions further consolidate the crystal structure.

The title compound crystallizes as closely associated pairs across an inversion center, with near approach enabled by Ni⋯S inter­molecular contacts of 3.396 (2) Å and bending of the di­thiol­ene ligands away from one another.

5-(3-Nitro-1H-pyrazol-4-yl)tetra­zole crystallizes with two mol­ecules of nearly identical conformation in the asymmetric unit.

The crystal structure of entinostat Form B has been solved and refined using laboratory X-ray powder diffraction data, and optimized using density functional techniques.

The asymmetric unit of the title compound contains isoxazol and phenyl rings. The 2-cyano­acrylate moiety is in an E- configuration. In crystal, there are there are no inter­molecular hydrogen-bonding or C—H⋯π(ring) inter­actions, only a π–π inter­action between the parallel isoxazol rings with centroid-to-centroid distance of 3.4932 (9) Å.

The title salt features BO4 tetra­hedra at the centre of [B(C3H2O4)2]− anions.

The structure of the title compound was determined at 100 K. In the crystal, the mol­ecules are connected through C—H⋯N and C—H⋯Cl inter­molecular hydrogen bonds generating a network that extend along the [010] direction. I

The title was synthesized by an acid–phenol coupling reaction. In the crystal, inter­molecular C—H⋯O hydrogen bonding links the mol­ecules into cyclic hydrogen-bonded inversion dimers with R22(10) motifs. The packing is further consolidated by C—H⋯π and C—Cl⋯π inter­actions.

Tetra­cyano­quinodi­methane (TCNQ - C12H4N4) can be doubly protonated by the superacid HF/AsF5 to give crystals of [C12H6N4]2+[AsF6]−2.

The neutral title compound bis­{3-(benzo[d][1,3]dioxol-5-yl)-5-[6-(1H-pyrazol-1-yl)pyridin-2-yl]-4H-1,2,4-triazol-4-ido}nickel(II) methanol disolvate has a distorted pseudo­octa­hedral coordination environment of the metal ion. As a result of their conical shape and polar nature, the mol­ecules stack in one-dimensional columns that are bound by weak hydrogen bonds into layers, which are arranged in three dimensions without inter­layer inter­actions below van der Waals radii.

The central pyridinic rings are approximately coplanar to the benzo­thia­zole moieties in both the neutral mol­ecule and the anion. Bond lengths and angles indicate considerable delocalization of the multiple bonding. The neutral mol­ecule is E-configured about the central C&z-dbnd;C bond, but the anion is Z. Classical and ‘weak' hydrogen bonds lead to a broad ribbon of residues.

The mol­ecular conformation of the title compound, C24H23NO5·C3H7NO, is consolidated by intra­molecular C—H⋯O O—H⋯O hydrogen bonds, forming an S(6) ring motif. In the crystal, the mol­ecules are connected by C—H⋯O hydrogen bonds, forming layers parallel to the (101) plane. Additionally, C—H⋯π inter­actions lead to the formation of layers parallel to the (102) plane.