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ISSN: 2414-3146

May 2018 issue

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Cover illustration: The crystal structure of diiso­propyl­ammonium hydrogen phthalate exhibits N-H...O hydrogen-bonded chains that are linked by weak C-H...O hydrogen bonds to form pleated sheets. See: Seye, Diop, Diop & Geiger [IUCrData (2017). 3, x180704].

inorganic compounds


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The crystal structure of KBrF4 was refined against single-crystal X-ray diffraction data and compared with the previous results.

metal-organic compounds


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In the organic–inorganic hybrid material, (C8H12N)2[ZnBr4], tetra­hedral [ZnBr4]2− anions are connected by N—H⋯Br and C—H⋯Br hydrogen bonds to the 4-methyl­benzyl­ammonium cations.

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The crystal structure of a p-cymene-based ruthenium(II) complex featuring rather unusual hydrogen bonding has been determined.

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In the title compound, [CuNa2(C9H4O6)2(H2O)4]n, the CuII cations are square-planar coordinated by carboxyl­ate O-atom donors from four different hydrogen benzene-1,2,4-tri­carboxyl­ate (btcH) ligands, thereby forming [Cu(btcH)2]n2n coordination polymer ribbons. These are connected by octa­hedrally coordinated and hydrated NaI cations within Na2(μ-H2O)2 clusters to construct the full [Na2(H2O)4Cu(btcH)2]n three-dimensional coordination polymer.


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The asymmetric unit of the title compound, [Ni(C36H24N6)3](PF6)2, contains one and a half nickel(II) complex dications and three hexa­fluorido­phosphate anions; one of the dications having crystallographic twofold rotational symmetry.

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The title compound crystallizes with two mol­ecules in the asymmetric unit. The cyclo­penta­dienyl rings of the ferrocenyl moieties adopt eclipsed conformations.

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The title complex cation possesses twofold rotational symmetry, with the octa­hedrally coordinated cobalt(III) atom being located on a twofold rotation axis.

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In the title compound, the Pd atom is coordinated by three chlorine atoms and one aceto­nitrile.

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An organic–inorganic hybrid salt is comprised of methyl­benzyl­ammonium cations that are situated between 2[CdBr4/2Br2/2]2− anionic layers extending parallel to the ac plane.

organic compounds


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In the title compound, C15H11N3O4, the oxazine ring exhibits a half chair conformation, and the pyrrolidine ring adopts an envelope conformation; the dihedral angle between them is 78.63 (9)°. In the crystal, mol­ecules are linked via N—H⋯O and C—H⋯O hydrogen bonds into sheets parallel to the bc plane.

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The mol­ecular and crystal structure of the title tetra­hydro­quinoxaline derivative is reported. The crystal structure is stabilized by C—H⋯O hydrogen bonds and π-stacking inter­actions. Inter­calation of the n-decyl chains completes the crystal packing.

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The title compound exhibits symmetric three-centre (bifurcated) intra­molecular hydrogen bonds. In the crystal, mol­ecules are linked via C—H⋯N hydrogen bonds, forming 31 helices along the c-axis direction.

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The title compound OPPh2—N(NH2)-Ph2PO contains a diphosphazane backbone, as well as a hydrazine entity which are nearly planar.

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The crystal structure of diiso­propyl­ammonium hydrogen phthalate exhibits N—H⋯O hydrogen-bonded chains that are linked by weak C—H⋯O hydrogen bonds to form pleated sheets.

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The title compound crystallizes with two chiral isophthalamide–camphor mol­ecules and one di­chloro­methane solvent mol­ecule in the asymmetric unit.
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