Syntheses and structures of two coordination polymers formed by Ni(cyclam)²⁺ cations and sulfate anions

The coordination polyhedra of the complex cations in the one-dimensional title coordination polymers represent tetra­gonally distorted trans-NiN₄O₂ octa­hedra with the four N atoms of the macrocyclic ligand forming the equatorial plane and two O atoms of the sulfate anions occupying the axial positions.

Synthesis and crystal structure of [Sr(urea)(NO₃)₂]_n

The mol­ecular and crystal structure of the [Sr(urea)(NO₃)₂]_n complex was studied to investigate the various inter­molecular inter­actions.

Crystal structure, Hirshfeld surface analysis and crystal voids of 4-nitro­benzo[c][1,2,5]selena­diazole

The title compound is almost planar. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into a network structure. There are also π–π inter­actions present with centroid-to-centroid distances of 3.746 (3) and 3.697 (3) Å.

Crystal structure of poly[μ₃-acetato-di­aqua-μ₃-sulfato-cerium(III)]: serendipitous synthesis of a layered coordination polymer exhibiting inter­layer O—H⋯O hydrogen bonding

In the crystal structure of the title compound, the Ce^III cations are ninefold coordinated and linked into chains via the acetate anions and are further connected into layers by the sulfate dianions.

Synthesis, crystal structure and Hirshfeld surface analysis of 5,5-di­phenyl-2-[2-(propan-2-yl­idene)hydrazin-1-yl]-4,5-di­hydro-1H-imidazol-4-one N,N-di­methyl­formamide hemisolvate

The asymmetric unit consists of two independent mol­ecules of the substituted imidazolone having different conformations, and one mol­ecule of solvent DMF. The two imidazolone mol­ecules are linked by N—H⋯N and C—H⋯O hydrogen bonds and the DMF is joined to one of these by a N—H⋯O hydrogen bond. Additional N—H⋯N and C—H⋯O hydrogen bonds link these groups into corrugated layers parallel to the (101) plane with the layers joined by C—H⋯π (ring) inter­actions.

Crystal structures of three salts of the tri­phenylsulfonium ion

The crystal structures of three salts of tri­phenyl­sulfonium ion are reported, namely, tri­phenyl­sulfonium triiodide (I), tri­phenyl­sulfonium perchorate (II), tri­phenyl­sulfonium hexa­fluoro­phosphate (III).

Syntheses, crystal structures, Hirshfeld surface analyses and crystal voids of 1-(4-bromo­phen­yl)-2,2-di­chloro­ethan-1-one and 2,2-di­bromo-1-(p-tol­yl)ethan-1-one

The asymmetric units of the compounds, (I) and (II), contain two and one crystallographically independent mol­ecules, respectively. In crystals of (I) and (II), inter­molecular C—H⋯O hydrogen bonds link the mol­ecules into infinite chains along the b-axis direction. In crystal of (I), there are π–π inter­actions between the centroids of the parallel rings while neither π–π nor C—H⋯ π(ring) inter­actions are present in (II).

(2,9-Di­methyl-1,10-phenanthroline)bis­[2-(pyridin-2-yl)phen­yl]iridium(III) hexa­fluoro­phosphate and (2,9-di­methyl-1,10-phenanthroline)bis­[5-methyl-2-(pyridin-2-yl)phen­yl]iridium(III) hexa­fluoro­phosphate–di­ethyl ether–aceto­nitrile (1/0.61/0.78)

The title compounds exhibit Ir—C and Ir—N bond lengths typical of cyclo­metallated iridium compounds with phenyl­pyridine ligands. Methyl­ation of the phenanthroline ligand leads to longer Ir—N bond lengths compared to the unmethyl­ated analog.

Crystal structures of zinc(II) coordination complexes with iso­quinoline N-oxide

The structures of five related zinc coordination compounds with iso­quinoline N-oxide and other ligands or counter-ions are presented.

Crystal structure and Hirshfeld surface analysis of a new polymorph of chlorido­bis­(1,10-phenan­throline-κ²N,N′)copper(II) perchlorate

Structure analysis of the title compound revealed a second polymorph (space group C2/c, Z = 4) with composition [CuCl(C₁₂H₈N₂)₂]⁺ClO₄⁻. Both the cation and anion in this polymorph exhibit point group symmetry 2.

Crystal structure and Hirshfeld surface analysis of 2-methyl­quinazolin-4(3H)-one hydro­chloride

The quinazolinium moiety of the organic cation is located about a mirror plane. In the crystal, individual cations are linked into [010] zigzag chains by N—H⋯Cl hydrogen-bonding inter­actions.

Synthesis and crystal structures of 4,4′-methyl­enebis­(2,6-di­ethyl­aniline) and 4,4′-methyl­enebis(3-chloro-2,6-di­ethyl­aniline)

Ep­oxy curers 4,4′-methyl­enebis(2,6-di­ethyl­aniline) and 4,4′-methyl­enebis(3-chloro-2,6-di­ethyl­aniline) were prepared and studied by ¹H NMR and single-crystal X-ray analysis.

Syntheses and crystal structures of the cerium-based coordination polymers poly[(acetic acid)bis­(μ-5-carb­oxy­thio­phene-2-carboxyl­ato)bis­(μ-thio­phene-2,5-di­carboxyl­ato)dicerium(III)] and poly[(μ-acetato)­aqua­(μ₄-thio­phene-2,5-di­carboxyl­ato)cerium(III)]

In the crystal structures of the title compounds, the Ce^III cations are eightfold coordinated and linked into three-dimensional frameworks by ligands based on different deprotonated derivates of 2,5-thio­phenedi­carb­oxy­lic acid. Both compounds exhibit O—H⋯O hydrogen bonds.

Crystal structure and Hirshfeld surface analysis of the organic–inorganic hybrid compound tris­(2-iodo­ethyl­ammonium) hexa­iodido­bis­muthate(III)

The crystal structure of (IC₂H₄NH₃)⁺₃[BiI₆]³⁻ is composed of discrete [BiI₆]^3– octa­hedra, the charge of which is compensated by three crystallographically independent 2-iodo­ethyl­ammonium cations.

Synthesis and crystal structure of 2,2,2-tri­chloroethyl N-{4-[6-(1-hy­droxy­eth­yl)-1,2,4,5-tetra­zin-3-yl]benz­yl}carbamate

A 3,6-disubstituted 1,2,4,5-tetra­zine was synthesized and characterized by single-crystal X-ray diffraction, revealing a complex hydrogen-bonded network with inter­actions between tetra­zine N atoms and hydroxyl groups, thereby complementing the only scarcely explored features of tetra­zines in the solid state.

Synthesis and crystal structure analysis of 1-ethyl-1,3-di­hydro-2H-benzo[d]imidazole-2-thione

Mol­ecules of 1-ethyl-1,3-di­hydro-2H-benzo[d]imidazole-2-thione are almost planar. In the crystal, inter­molecular N—H⋯S hydrogen bonds link the mol­ecules into pseudocentrosymmetric dimers. N—H⋯S hydrogen bonds, π–π inter­actions and a weak C—H⋯π(ring) inter­action are effective in the stabilization of the crystal structure.

Synthesis and crystal structure of 5,10-bis­(phenyl­sulfon­yl)tetra­hydro­dibenzo­penta­lene

The structure of a curved 6–5–5–6 fused-ring system, with two benzene rings attached at both termini and a pair of phenyl­sulfonyl groups bonded to the two five-membered rings, is described.

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

The asymmetric unit of the title biphenyl-4-carboxamide contains two mol­ecules. In the crystal, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into chains propagating parallel to the c-axis direction.