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March 2023 issue
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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.
CCDC reference: 2240539
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.
CCDC reference: 2248354
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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.
CCDC reference: 2250090
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.
CCDC reference: 2246179
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The crystal structure determined for meloxicam hydrochloride is not isomorphous with the known structure of the hydrobromide analogue.
CCDC reference: 2246003
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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.
CCDC reference: 2245645
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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].
CCDC reference: 2246795
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The crystal structure of bucetin, an analgesic and antipyric similar to phenacetin, is presented.
CCDC reference: 2247342