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ISSN: 2414-3146

March 2023 issue

Early view articles

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Diffraction images for the plastic phase I of cyclo­hexane at 255 K show that molecules are disordered over 24 positions, through four-, three- and twofold rotation axis in space group Fm3m, forming clusters in which the C atoms are located on the vertices of a rhombic dodecahedron.

metal-organic compounds

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The structure of bis­[2-(thio­phen-2-yl)quinoxaline-κN4]silver(I) perchlorate, [Ag(C12H8N2S)2]ClO4, has a silver(I) metal center that sits on a twofold symmetry axis, as does a disordered perchlorate anion. The thienylquinoxaline ligand is nearly planar with the thienyl ring making a dihedral angle of 10.88 (8)° with respect to the quinoxaline moiety.

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In the title compound, the silver(I) metal center sits on a twofold rotation axis, as does the coordinated nitrato anion. The two 2-thienyl groups of the ligand make dihedral angles of 17.14 (9) and 77.55 (6)° with respect to the quinoxaline plane. The thienyl group that is less planar with the quinoxaline ring exhibits ring-flip disorder.

organic compounds

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In the title mol­ecule, C17H16N2OS, the di­hydro­imidazolone ring is slightly puckered and the methyl­sulfanyl group is nearly coplanar with it.

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The crystal structure determined for meloxicam hydro­chloride is not isomorphous with the known structure of the hydro­bromide analogue.

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The quinoxaline unit in the title mol­ecule is slightly puckered [dihedral angle between the rings = 2.07 (12)°] while the whole mol­ecule adopts an L-shaped conformation. The packing in the crystal is governed by C—H⋯O hydrogen bonds and slipped π-stacking inter­actions.

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The title enanti­opure tetra­lol derivative synthesized by asymmetric transfer hydrogenation crystallizes in the Sohncke space group P212121 and features one mol­ecule in the asymmetric unit. In the crystal, mol­ecules are hydrogen-bonded into chains running parallel to [010].

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The crystal structure of bucetin, an analgesic and anti­pyric similar to phenacetin, is presented.
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