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ISSN: 2414-3146

October 2023 issue

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Cover illustration: The salt bis­(di-isobutyl­ammonium) tetra­chlorido­bis­(3-tri­fluoro­methyl­phen­yl)stannate was obtained as a by-product in a reaction of tris­(3-tri­fluoro­methyl­phen­yl)tin chloride with acetic acid in the presence of di-isobutyl­amine. An inter­esting Sn—C cleavage occurred during this reaction. The asymmetric unit comprises a di-isobutyl­ammonium cation in a general position and a diorganotin tetra­chloride dianion, located on a centre of inversion; the SnIV atom is octa­hedrally coordinated. In the crystal, charge-assisted N+—H⋯Cl hydrogen bonds along with C—H⋯F contacts occur within supra­molecular layers that inter­digitate along the a-axis direction. See: Song & Li [IUCrData (2023). 8, x230913]

inorganic compounds

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The inter­metallic phase with composition Al0.88Cu0.94Fe0.18 was synthesized by high-temperature sinter­ing of a mixture with initial chemical composition Al78Cu48Fe13. Al0.88Cu0.94Fe0.18 adopts the CsCl structure type in space-group Pm[\overline{3}]m.

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The rerefinement of the crystal structure of α-ThBr4 (α-ThCl4 structure type) results in higher precision of the lattice parameters and the atomic coordinates.

metal-organic compounds

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A divalent copper tri-periodic coordination polymer with twofold inter­penetrating 658 cds topology, {[Cu(ceb)(bpmp)]·H2O]n, was structurally characterized by single-crystal X-ray diffraction.

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The title inorganic NiII polymer features layers with a triangular (3,6) grid topology, stacked in a ABAB pattern to form a triperiodic structure.

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The synthesis and crystal structure of a new triazole-based N-heterocyclic carbene iridium(I) cationic complex with a tetra­fluorido­borate counter-anion and solvating di­chloro­methane is reported. The IrI center of the cationic complex has a distorted square-planar conformation, formed by a bidentate cyclo­octa-1,5-diene (COD) ligand, an N-heterocyclic carbene, and a tripheylphosphane ligand. There are weak hydrogen-bonding inter­actions between C—H groupings of the iridium complex and F atoms of the [BF4] counter-ions.

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In the crystal structure of the title organic–inorganic hybrid layered perovskite, organic bilayers alternate with [CdCl4]n2n inorganic layers along [100].

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The title salt comprises di-isobutyl­ammonium cations and centrosymmetric tetra­chloro­bis-(3-trifuoro­methyl­phen­yl)stannate(IV) anions, which are connected in the crystal by N—H⋯Cl and C—H⋯F inter­actions.

organic compounds

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An asymmetric naphthyl-/methyl-substituted cyclo­penta­diene was synthesized and one isomer of five accessible through sigmatropic rearrangement was isolated and characterized by 1H NMR and X-ray diffraction. The title compound is envisioned as a π-bonded `antenna' ligand to enhance lanthanide ion luminescence sensitization.

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An intra­molecular C—H⋯O hydrogen bond helps to determine the conformation of the title mol­ecule in which the 2-chloro­benzyl group is rotationally disordered.

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The seven-membered 1,3-thia­zepan-4-one ring system, like its six- and five-membered-ring analogues, is known to be biologically active and is of potential medicinal use. The crystal structure reported is of the sulfone of a 1,3-thia­zepan-4-one in which the seven-membered ring adopts a pucker-chair conformation.
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