Synthesis and structure of (Z)-2-(eth­oxy­methyl­­idene)-2,3,4,9-tetra­hydro-1H-carbazol-1-one

Two crystallographically independent mol­ecules are present in the asymmetric unit of the title compound. C—H⋯O, N—H⋯O, C—H⋯π and π–π contacts connect mol­ecules in the crystal.

Redetermination of the crystal structure of the 3:1 urea–benzene-1,3,5-tri­carb­oxy­lic acid co-crystal by powder diffraction data

The redetermined structure of 3:1 urea/trimesic acid, 3CO(NH₂)₂·C₆H₃(CO2H)₃, has monoclinic (P2₁/c) symmetry. The compound has a hydrogen-bonding network structure of high inter­est for crystal engineering.

Structure determination of 3H-benzimidazol-1-ium chloride monohydrate

The title benzimidazolium chloride hydrate crystallizes in the ortho­rhom­bic space group Pnma. It was isolated as an unexpected product from a reaction mixture containing NbCl₅ and o-phenyl­enedi­amine.

Crystal structure of the ‘missing’ inter­metallic compound BaCu₅

The previously unreported inter­metallic compound BaCu₅ crystallizes in the rare SrZn₅ structure type, completing a missing composition in the alkaline-earth copper family.

Crystal structure and Hirshfeld surface analysis of 4′-chloro-5-oxo-N-phenyl-3-(thio­phen-2-yl)-2,3,4,5-tetra­hydro-[1,1′-biphen­yl]-4-carboxamide monohydrate

In the crystal, inter­molecular N—H⋯O, O—H⋯Cl, O—H⋯O and C—H⋯O hydrogen bonds connect mol­ecules to form a three-dimensional network. The mol­ecules are further connected by C—H⋯π inter­actions and face-to-face π–π inter­actions into layers parallel to the (001) plane.

Synthesis and structure of 4-[(2,3,4,5,6-pentafluoro­phen­oxy)carbon­yl]phenyl 4-(dec­yloxy)benzoate

In the title compound, the dihedral angles between the central aromatic ring and its peripheral rings are are 76.57 (2) and 69.71 (3)° and the C10 alkyl chain adopts an extended conformation.

Crystal structure and Hirshfeld surface analysis of (Z)-N′-(4-meth­oxy­benzo[d]thia­zol-2-yl)-3,6-di-p-tolyl-1,2,4-triazine-5-carboximidamide

In the crystal, the mol­ecules are linked by inter­molecular C—H⋯O and C—H⋯N hydrogen bonds, forming sheets parallel to the (010) plane. Furthermore, mol­ecules are connected by C—H⋯π and π–π [centroid-to-centroid distance = 3.7380 (12) Å] inter­actions, forming ribbons along the a-axis direction.

Crystal structure of seladelpar, C₂₁H₂₃F₃O₅S, from synchrotron powder diffraction data and density functional theory

The crystal structure of seladelpar has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques.

Synthesis and structure of 3-methylpyridinium 3-carb­oxy-5-nitrobenzoate monohydrate

A hydrated salt of 3-methyl­pyridine and 5-nitro­isophthalic acid has been synthesized using the reflux method. The crystal structure is consolidated by a network of significant inter­molecular inter­actions, including O—H⋯O, N—H⋯O, and C—H⋯O hydrogen bonds, along with additional π–π inter­actions, which collectively contribute to the robustness of the solid-state architecture.

Structure of bis­(tetra­ethyl­ammonium) molybdate dihydrate obtained by the reaction between ammonium molybdate and tetra­ethyl­ammonium hydroxide

The crystal structure of tetra­ethyl­ammonium molybdate dihydrate reveals two-dimensional layers of tetra­hedral molybdate mol­ecules bridged by water mol­ecules, with each Mo-oxo serving as a hydrogen bond acceptor.

A second ortho­rhom­bic polymorph of 3-ferro­cenylacrylaldehyde

The title compound is a second ortho­rhom­bic polymorph of Fe(C₅H₅)(C₈H₇O) and crystallizes in the same space group as the first polymorph.

Crystal structure and Hirshfeld surface analysis of 6-bromo-2-(penta­fluoro­phen­yl)-2,3,7,7a-tetra­hydro-3a,6-ep­oxy­isoindol-1(6H)-one

In the crystal, enanti­omeric mol­ecules are linked by C—H⋯O hydrogen bonds, forming layers parallel to the (101) plane. In addition, C—H⋯π inter­actions and Br⋯π contacts create layers parallel to the (101) plane.

Crystal structure, supra­molecular and Hirshfeld surface analysis of piperazine-1,4-diium bis­(2,5-di­bromo­benzoate)

The crystal structure of piperazine-1,4-diium bis­(2,5-di­bromo­benzoate) is reported, with detailed analysis of its intra- and inter­molecular hydrogen-bonding inter­actions, supra­molecular architecture, and Hirshfeld surface analysis.

Synthesis and crystal structure of 4,6-di­amino-3-(prop-2-en-1-yl)-2-sulfanyl­idene-2,3-di­hydro-1,3,5-triazin-1-ium chloride

In the title compound, the cations are hydrogen bonded in pairs, which are bridged by the chloride anions through N—H⋯Cl hydrogen bonding.

Synthesis, structure and computational study of N-acetyl-N′-(4-chloro­phen­yl)­thio­urea

The title compound consists of a chloro­phenyl ring and acetyl moiety bridged over a thio­urea functional group. In the crystal, N—H⋯S and N—H⋯O hydrogen bonds link the mol­ecules into infinite chains along the a-axis direction. Neither π–π nor C—H⋯π(ring) inter­actions are observed.

Synthesis and crystal structures of three silicon complexes with N-[(2-hy­droxy­naphthalen-1-yl)methyl­idene]alanine

The reaction of the Schiff base ligand N-[(2-hy­droxy­naphthalen-1-yl)methyl­idene]alanine, H₂L, with di­chloro­diorganosilicon compounds, Cl₂SiR₂, yields penta­coordinated silicon complexes LSiR₂.

Synthesis, crystal structure and Hirshfeld surface analysis of 1-[(1-benzyl-1H-1,2,3-triazol-4-yl)meth­yl]-3-(2-oxo-2-phenyl­eth­yl)-1,3-di­hydro-2H-benzimidazol-2-one

In the title mol­ecule, the benzyl­triazole moiety and the phenyl portion of the 3-(2-oxo-2-phenyl­eth­yl) group are disordered over two sites. In the crystal, layers of mol­ecules parallel to the ab plane are generated by C—H⋯O and C—H⋯N hydrogen bonds, enclosing R²₂(10) and R²₂(16) ring motifs, and C—H⋯π(ring) inter­actions.

Syntheses and structures of two norpsilocin derivatives: N-ethyl-4-hy­droxy­tryptamine (4-HO-NET) and 4-hy­droxy-N-propyl­tryptamine (4-HO-NPT)

The solid state structures of two synthetic N-monoalkytryptamine analogs of the ‘magic' mushroom natural product norpsilocin are presented.

Bis(tetra­ethyl­ammonium) dodeca­cyanododecaborate(2−)

Bis(tetra­ethyl­ammonium) dodeca­cyano­dodeca­borate(2−) crystallizes in the trigonal space group P3. The B₁₂(CN)₁₂^2– subunit has nearly icosa­hedral symmetry and interacts with the Et₄N⁺ cation in the structure by multiple weak Csp³–H⋯N hydrogen bonds between CN groups on the anion and methyl or methyl­ene H atoms on the cation.

Crystal structure of racemic chloramphenicol

The racemic title compound crystallizes in space group P1 compared to C222₁ for the chiral natural form.

A lanthanum complex with 3,4,5,6-tetra­bromophthalate as ligand

A lanthanum-based complex with chemical formula [La(tbpa)(Htbpa)(H₂O)₇] where H₂tbpa is 3,4,5,6-tetra­bromo­phthalic acid has been prepared and structurally described.

Synthesis and structure of benzyl 4-{[4-(hex­yloxy)benzo­yl]­oxy}benzoate

In the title compound, the aromatic ring of the 4-hexyl­oxybenzoyl moiety and the central benzoate ring are twisted relative to one another, subtending a dihedral angle of 39.7 (2)°. The hex­yloxy chain adopts an extended, approximately all-anti conformation and two short intra­molecular C—H⋯O contacts are observed. In the extended structure, C—H⋯π inter­actions help to consolidate the packing.