Two acyclic imides: 3-bromo-N-(3-bromo­benzo­yl)-N-(pyridin-2-yl)benzamide and 3-bromo-N-(3-bromo­benzo­yl)-N-(pyrimidin-2-yl)benzamide

The title acyclic meta-bromo substituted imide derivatives were synthesized in good yields from condensation reactions of 3-bromo­benzoyl chloride with 2-amino­pyridine or 2-amino­pyrimidine using standard condensation reaction conditions and subsequent column chromatography.

Crystal structures of 2-amino-2-oxo­ethyl 4-bromo­benzoate, 2-amino-2-oxo­ethyl 4-nitro­benzoate and 2-amino-2-oxo­ethyl 4-amino­benzoate monohydrate

The title mol­ecules were synthesized by the reaction of the corresponding sodium benzoate with chloro­acetic acid amide. Single crystals were obtained from the reaction products under the same conditions.

Crystallographic and spectroscopic characterization of 3-chloro-5-fluoro­salicyl­aldehyde

The title dihalogenated salicyl­aldehyde derivative has been studied for its anti­bacterial characteristics. The salicyl­aldehyde engages in intra­molecular hydrogen bonding at a distance of 2.6231 (19) Å while the mol­ecules pack together via weak inter­molecular C—H⋯O, C—H⋯F and F⋯O inter­actions and offset face-to-face π-stacking.

Comparison of mol­ecular structures of cis-bis­[8-(di­methyl­phosphan­yl)quinoline]­nickel(II) and -platinum(II) complex cations

Owing to the intra­molecular steric hindrance between the mutually cis-positioned 8-(di­methyl­phosphan­yl)quinoline (Me₂Pqn) ligands, the nickel(II) complex of cis-[Ni(Me₂Pqn)₂]²⁺ shows a remarkable tetra­hedral distortion of the Ni^II coordination geometry. In contrast, the corresponding platinum(II) complex of cis-[Pt(Me₂Pqn)₂]²⁺ exhibits a typical square-planar Pt^II coordination center, but large envelope-type distortions of the five-membered chelate planes are observed.

Ethyl 5-methyl-3-[11-(pyridin-2-yl)-6,11-di­hydro-6,11-ep­oxy­dibenzo[b,e]oxepin-6-yl]isoxazole-4-carboxylate: a bicyclic acetal from the rearrangement of an anthracenyl isoxazole

The title compound, a rearrangement product of an o-pyridinyl anthracenyl isoxazole ester, features a bicyclic acetal structure, which has two extended almost co-planar ring systems, which subtend a fold angle of 102.17 (5)°. In the crystal, the mol­ecules are closely knitted together through C—H⋯N and C—H⋯O hydrogen bonds and form chains of alternating enanti­omers propagating along the c-axis direction.

Crystal structure and Hirshfeld surface analysis of a third polymorph of 2,6-di­meth­oxy­benzoic acid

A third monoclinic polymorph of 2,6-di­meth­oxy­bnzoic acid is reported. The acidic O—H bond of the carboxyl group adopts a synplanar conformation.

Crystal structure and Hirshfeld analysis of di-tert-butyl 2,2′-[(ethyl­aza­nedi­yl)bis­(methyl­ene)]bis­(1H-pyrrole-1-carboxyl­ate)

In the title compound, inter­molecular C—H⋯π inter­actions and π–π stacking inter­actions help to stabilize the crystal structure, forming a three-dimensional network.

Mol­ecular and crystal structure, Hirshfeld analysis and DFT investigation of 5-(furan-2-yl­methyl­idene)thia­zolo[3,4-a]benzimidazole-2-thione

The crystal structure of the title compound is stabilized by the presence of weak C—H⋯N hydrogen bonds and slipped π–π inter­actions. Hirshfeld surface analysis showed that H⋯H contacts are the dominant inter­actions.

Two salts of the 6,6-di­fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide anion with different cations

The crystal structures are reported of the 6,6-di­fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide (or 9,9-di­fluoro-10-oxa-9-boraphenanthren-9-id)anion with two different cations, namely, potassium 6,6-di­fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide featuring a polymeric structure, and bis­(tetra­phenyl­phospho­nium) bis­(6,6-di­fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide) aceto­nitrile tris­olvate, which is composed of discrete cations, anions and aceto­nitrile solvent mol­ecules linked by C—H⋯O, C—H⋯N and C—H⋯F hydrogen bonds.

Crystal structure of bis­(tetra­methyl­thio­urea-κS)bis­(thio­cyanato-κN)nickel(II)

The title compound, [Ni(NCS)₂(C₅H₁₂N₂S)₂], consists of discrete complexes with a distorted all-trans square-planar coordination geometry that are linked by inter­molecular C—H⋯S hydrogen bonds into corrugated layers parallel to the ac plane.

Crystal structure of a new hydrate form of the NSAID sodium diclofenac

The crystallization of a new hydrated form of sodium diclofenac was achieved, with the anions surrounding an [Na₄]⁴⁺ cationic cluster formed with water mol­ecules and carb­oxy­lic O atoms.

Unexpected synthesis and crystal structure of N-{2-[2-(2-acetyl­ethen­yl)phen­oxy]eth­yl}-N-ethenyl-4-methyl­benzene­sulfonamide

The title N-tosyl­ated secondary vinyl­amine was obtained by alkaline treatment of 1,5-bis­(1-phen­oxy)-3-aza­pentane at moderate heating. Theoretical predictions suggest that the title compound could inhibit gluconate 2-de­hydrogenase (85% probability), as well as to act as a mucomembranous protector (73%).

Synthesis and structure of a 1:1 co-crystal of hexa­methyl­ene­tetra­mine carb­oxy­borane and acetamino­phen

Acetamino­phen assists as a co-former in the crystallization of hexa­methyl­ene­tetra­mine carboacetamino­phenborane, which may otherwise be challenging to form a crystal itself.

X-ray crystal structure of trans-bis­(pyridin-3-yl)ethyl­ene: comparing the supra­molecular structural features among the symmetrical bis­(n-pyrid­yl)ethyl­enes (n = 2, 3, or 4) constitutional isomers

The single-crystal X-ray structure of trans-bis­(pyridin-3-yl)ethyl­ene (3,3′-bpe) is reported. Integrity between neighboring mol­ecules in the solid state is maintained by an array of C—H⋯N hydrogen bonds and edge-to-face C—H⋯π inter­actions.

Crystal structures of the penta- and hexa­hydrate of thulium nitrate

The title compounds represent the most hydrated thulium nitrates known so far. Both structures consists of mol­ecular [Tm(NO₃)₃(H₂O)₄] complexes and additional water mol­ecules, which are inter­connected by medium-strong to weak hydrogen bonds.

Crystal structure of the coordination polymer catena-poly[[bis­[hy­droxy(phen­yl)acetato-κ²O¹,O²]zinc(II)]-μ₂-1,2-bis­(pyridin-4-yl)ethane-κ²N:N′]

The synthesis and characterization of a new mandelato Zn^II complex with 1,2-bi(4-pyrid­yl)ethane is reported. The Zn cation is coordinated by two N atoms from the 1,2-bi(4-pyrid­yl)ethane unit and four O atoms from two mandelate anions in a slight distorted octa­hedral coordination geometry.

Crystal structures and comparisons of potassium rare-earth molybdates KRE(MoO₄)₂ (RE = Tb, Dy, Ho, Er, Yb, and Lu)

Six potassium rare-earth molybdates KRE(MoO₄)₂ (RE = Tb, Dy, Ho, Er, Yb, and Lu) were synthesized by flux-assisted growth in K₂Mo₃O₁₀. The crystal structures were determined using single-crystal X-ray diffraction data. The synthesized molybdates crystallize within the ortho­rhom­bic Pbcn space group (No. 60). The unit-cell parameters a and c increase linearly whereas b decreases with larger RE cations, based on crystal radii. The unit-cell volumes increase linearly and the densities decrease linearly with larger RE cations.