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Journal logoIUCrDATA
ISSN: 2414-3146

April 2017 issue

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Cover illustration: The molecule of the compound N2,N2,N6,N6-tetra­phenyl­pyridine-2,6-di­amine has an unsymmetrical structure, although it can possess Cs symmetry. In the crystal, C-H...N interactions between the phenyl and pyridyl rings lead to a molecular array along the b axis and C-H...[pi] inter­actions are also observed. These inter­actions are thought to be one of the reasons for lowering mol­ecular symmetry. See: Miki, Umezono & Okuno [IUCrData (2017). 2, x170521].

metal-organic compounds


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The X-ray structure of an organomerury(II)thio derivative, prepared from a substituted di­thio­carbamate, is reported.

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In the mol­ecule of the title compound, the cobalt(II) atom shows a distorted tetra­hedal geometry. In the crystal, inversion-related pairs of mol­ecules are weakly connected by C—H⋯π inter­actions into dimeric units.

organic compounds


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The mol­ecular and crystal structure of the title benzodiazepinone derivative is reported. The conformation of the acetyl group is partially determined by an intra­molecular N—H⋯O hydrogen bond. In the crystal, pairwise C—H⋯O hydrogen bonds form inversion dimers.

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The title compound was synthesized from potassium (2-meth­oxy­benzo­yl)hydrazinecarbodi­thio­ate by the reaction of methyl iodide and characterized by single-crystal X-ray diffraction data along with elemental analysis, IR and NMR spectroscopy.

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The title steroidal compound, derived from hecogenin, forms supra­molecular chains C(8) in the crystal, oriented parallel to the short axis a.

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The mol­ecular and crystal structure of the title compound is reported. The crystal structure is stabilized by C—H⋯O hydrogen bonds and a weak C—H⋯π(ring) contact.

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In the title compound, the planar chromenone ring system is nearly co-planar with the phenyl ring, the dihedral angle being 3.85 (8)°.

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The mol­ecular and crystal structure of the title triazole derivative is reported. The crystal structure features C—H⋯N and C—H⋯O hydrogen bonds and N=O⋯π(ring) contacts.

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The mol­ecular and crystal structure of the title triazole derivative is reported. The crystal structure is stabilized by C—H⋯N and C—H⋯O hydrogen bonds and N=O⋯π inter­actions, stacking the mol­ecules along the c-axis direction.

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The mol­ecular and crystal structure of the title hydrazinecarbothi­amide derivative is reported. The crystal structure features N—H⋯S hydrogen bonds.

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In the title compound, the n-octyl chains are largely in `extended' conformations so that the mol­ecules pack to generally form polar and non-polar regions. The major inter­molecular inter­action appears to be complementary π-stacking between oppositely oriented tetra­hydro­quinoxaline units.

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The title compound has an unsymmetrical structure. In the crystal, C—H⋯N inter­actions between the phenyl and pyridyl rings lead to a mol­ecular array along the b axis.

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The title modified β-himachalene compound is built up from fused six- and seven-membered rings and an additional three-membered ring.

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In the title ebselen derivative, the mean plane of the benzisoselenazolyl ring system is inclined to the 3-methyl­phenyl ring by 5.37 (11)°. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds and short inter­molecular Se⋯O contacts of 2.6917 (19) Å, forming chains along the c-axis direction.

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In the title compound, the dihedral angle between the coumarin ring system and the benzene ring is 70.18 (6)°. In the crystal, π–π inter­actions link the mol­ecules into a three-dimensional framework.

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The title compound is an important pharmacophore mol­ecule exhibiting a number of biological activities. The fused three-ring system is planar and almost perpendicular to the 1-phenyl­ethanone group.

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The mol­ecular structure features a weak O—H⋯N hydrogen bond and C—H⋯O contacts. Weak C—H⋯π inter­actions are observed in the crystal packing.

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In the title compound, the pyrrolidine ring adopts an envelope conformation, with the N atom as the flap, and the cyclo­penta­none ring adopts a twisted conformation. The dihedral angle between these rings is 82.02 (15)°. The packing features weak C—H⋯O inter­actions.

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The title pyrazolo­[1,2-a]cinnolin-1-one derivative, crystallizes with two independent mol­ecules (A and B), with slightly different conformations, in the asymmetric unit. In the crystal, the A and B mol­ecules are linked by a pair of C—H⋯O hydrogen bonds, forming an A–B dimer with an R_{2}^{2}(14) ring motif.

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The title compound consists of a chromene moiety substituted by two meth­oxy­phenyl groups and a hy­droxy group. The two benzene rings are inclined to one another by 67.0 (2)° and to the mean plane of the 1H-isochromene ring system by 67.21 (16) and 27.61 (17)°.

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The title salophene-type compound crystallizes with two independent mol­ecules (A and B) in the asymmetric unit. The pyrrole rings are inclined to the central benzene ring by 43.7 (3) and 78.9 (2)° in mol­ecule A, and by 46.8 (3) and 79.3 (3)° in mol­ecule B. In the crystal, mol­ecules are linked by N—H⋯N hydrogen bonds, forming chains propagating along the a-axis direction.

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In the title Schiff base compound, the 4-meth­oxy­benzene ring and the p-phenyl­enedi­amine ring are inclined to the phenol ring by 11.60 (2) and 46.04 (2)°, respectively, and the conformation about the C=N and N=N bonds is E.

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In the title compound, the dihedral angle between the aromatic ring planes is 6.09 (17)°. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into C(6) [001] chains.

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The C—S—C bond angle in the title compound is 99.41 (9)°. In the crystal, inversion dimers linked by pairs of extremely weak C—H⋯N inter­actions occur, as does a short S⋯N contact.

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The central 1,4-di­hydro­pyridine ring of the title compound adopts a shallow sofa conformation (with the C atom bearing the bromo-phenol ring as the flap),

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All the non-H atoms of the title compound, except the CH3 groups of the isopropyl unit and the O atoms of the nitro group, lie on a crystallographic mirror plane.

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The chloride anions of the title compound are sixfold coordinated by C—H⋯Cl hydrogen bonds from the pyridinium cations.

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The title compound was obtained by the reaction of sulfur with the corresponding quaternary salt in the presence of K2CO3. It crystallizes with two half-mol­ecules in the asymmetric unit, the complete mol­ecules being generated by inversion symmetry.

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The solvated title compound is a product of a condensation reaction between 2-amino-N-(2-chloro­pyridin-3-yl)benzamide and phosgene. The presence of the chlorine substituent on the pyridine ring forces the latter to adopt a nearly perpendicular orientation relative to the planar quinazoline ring (r.m.s. deviation = 0.04 Å), the two ring systems being inclined to one another by 84.28 (9)°.
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