A lanthanum coordination polymer with 3,6-di­chloro­phthalate and 2,4-di­chloro-6-(eth­oxy­carbon­yl)benzoate as ligands

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

Crystal structure and Hirshfeld surface analysis of 5,5-di­chloro-2-(di­chloro­meth­yl)-6,6-di­methyl-5,6-di­hydro­pyrimidin-4-amine

In the crystal, N—H⋯N hydrogen bonds of R²₂(8) motif dimers generate ribbons of mol­ecules in the crystal that are linked in the [101] direction.

Crystal structure and Hirshfeld surface analysis of catena-poly[4-amino-4H-1,2,4-triazol-1-ium [lead(II)-tri-μ-bromido]]

The hybrid organic–inorganic compound (4-amino-1,2,4-triazolium)PbBr₃ crystallizes in a polar space group and features polymeric one-dimensional inorganic chains formed by face-sharing distorted octa­hedra, which alternate with organic cations.

The missing representatives of the hydrated sodium orthophosphate phases: Na₃(PO₄)(H₂O)₇ and Na₃(PO₄)(H₂O)₆

Depending on their water content, the two phosphates Na₃(PO₄)(H₂O)_n (n = 6, 7) exhibit different cross-linking of the polyhedra around the sodium cations, namely in the form of layers (n = 7) or a three-dimensional framework (n = 6).

Crystal structure and Hirshfeld surface analysis of 2,6-bis­[1-(prop-2-yn-1-yl)-1H-benzo[d]imidazol-2-yl]pyridine 0.144-hydrate

In the hydrated title compound, two substituted benzimidazole ring systems are bridged over a pyridine ring. O—H—N and C—H—O hydrogen bonds as well as π–π stacking inter­actions consolidate the crystal packing.

Crystal structures of two isomers of 1-(naphthalen-1-yl)ethanol

Crystal structures, Hirshfeld surfaces and energy lattices of (S)-1-(naphthalen-1-yl)ethanol (1) and (R)-1-(naphthalen-2-yl)ethanol (2), both C₁₂H₁₂O, were studied to understand much lower crystallization propensity of the latter. The study provides new insights into the supra­molecular inter­actions and crystal packing of regioisomeric naphthalenyl-ethanol compounds, which may have implications for the design of new materials with tailored properties.

Crystal structure and Hirshfeld analysis of poly[bis­(N,O-di­methyl­hydroxyl­ammonium) [di-μ₂-iodido-di­iodido­plumbate(II)]]

The crystal structure of (C₂H₈NO)₂[PbI₄] is layered and can be derived from the perovskite structure where the N,O-di­methyl­hydroxyl­ammonium cations are organized in layers and bound to the anionic layers through N—H⋯I inter­actions.

Synthesis, crystal structure and Hirshfeld surface analysis of [Cu(NO₃)₂{8-methyl­phenanthridin-6(5H)-one}₄]

The asymmetric unit of the title compound, C₅₆H₄₄CuN₆O₁₀, contains one half of the complex mol­ecule. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules, enclosing R⁴₄(18) ring motifs. In addition π–π inter­actions with centroid-to-centroid distances of 3.808 (2) Å and also a series of C—H⋯π(ring) inter­actions help to consolidate the packing in a three-dimensional architecture within the crystal.

5-Cyclo­hexyl-1,3-di­phenyl-1,3,5-di­aza­phosphinane, its phosphine oxide, and its [NiCl₂L₂] complex

Crystal structures have been obtained for the heterocyclic NPN compound, 5-cyclo­hexyl-1,3-diphenyl-1,3,5-di­aza­phosphinane and its air oxidized phosphine oxide, 5-cyclo­hexyl-1,3-diphenyl-1,3,5-di­aza­phosphinan-5-one. The nickel(II) dichloride complex with bis di­aza­phosphinane ligands has also been obtained and structurally characterized.

Crystal structure and Hirshfeld surface analysis of anhydrous salt of levofloxacin and 4-methyl­benzoic acid

In the crystal of the anhydrous salt of levofloxacin with 4-methyl­benzoic acid, C₁₈H₂₁FN₃O₄⁺·C₈H₇O₂⁻, the levofloxacinium ions inter­act with the 4-methyl­benzoate anion via N—H⁺⋯O⁻ and C—H⋯O hydrogen bonds, forming a tape-like supra­molecular structure.

Synthesis and structure of a tetra­hedral homoleptic Cu^I complex with xylyl isocyanide

Treatment of a tetra­(aceto­nitrile)­copper(I) precursor with excess xylyl isocyanide forms the title tetra­(isocyanide)copper(I) complex, which was characterized structurally and spectroscopically.

Crystal structure and Hirshfeld surface analysis of chiral catena-poly[L-histidinediium [[di­iodido­cuprate(I)]-μ-iodido] monohydrate]

The newly synthesized compound (L-HisH₂)CuI₃·H₂O (where L-HisH₂ = L-histidinium) possesses a rare one-dimensional A₂CuX₃-type structure built from chiral left-handed helical chains of corner-sharing [CuI₄] tetra­hedra. Crystal structure and Hirshfeld surface analyses reveal that hydrogen bonding and π⋯I inter­actions play a vital role in mediating the inter­actions between the organic and inorganic components of this compound. Distortion analysis using τ₄, τ₄', and Baur indices shows that this compound exhibits the lowest [CuI₄] tetra­hedral distortion among reported analogues.

Synthesis and structure of 2-amino-1-methylbenzimid­azolium tetra­kis­[4,4,4-tri­fluoro-1-(1,3-thia­zol-2-yl)butane-1,3-dionato-κ²O,O′]cerium(III)

In the complex anion in the title compound, the cerium cation adopts a near regular square-anti­prismatic coordination geometry arising from four O,O-bidentate ligands.

Crystal structures and conformational features of new forms of tinidazole

Single-crystal X-ray diffraction studies were performed on two new forms of tinidazole: triclinic and hemihydrate, and their structures were compared to that of the known monoclinic form.

Crystal structure of 4-chloro-N-{5-(4-meth­oxyphen­yl)-4-[(4-meth­oxy­phen­yl)amino]-6-sulfanyl­idene-1,2,5,6-tetra­hydro-1,3,5-triazin-2-yl­idene}benzene­sulfonamide di­methyl sulfoxide disolvate

The (modified) triazine ring in the title compound is planar. The packing involves classical and ‘weak' hydrogen bonds, together with π contacts to the triazine ring.

Synthesis, crystal structure and Hirshfeld surface analysis of a coordination compound of silver nitrate with 2-amino­benzoxazole

In the complex [Ag(2AB)₂]NO₃·(2AB)₂ (2AB: 2-amino­benzoxazole), the central silver atom is coordinated monodentately by two 2AB ligands forming a linear geometry. The extended structure features N—H⋯N, N—H⋯π and π–π inter­actions.

Crystal structure of tris­[hexa­kis­(imidazole)cobalt(II)] bis­(benzene-1,3,5-tri­carboxyl­ate)

The structure of a tris­[hexa­kis­(imidazole)­cobalt(II)] bis­(benzene-1,3,5-tri­carboxyl­ate) compound was determined by single-crystal X-ray diffraction.

Synthesis and structure of 2-amino-4-methylpyridin-1-ium hydrogen squarate

The extended structure of the title salt features a network of N—H⋯O, O—H⋯O, and C—H⋯O hydrogen bonds, which generate infinite layers.

A new paper-based approach for teaching Bragg's law

A paper-based virtual X-ray diffraction experiment, which is based on the right-angle condition for constructive inter­ference, allows the implications of Bragg's law to be studies in a simple way.